Privacy Policy

CaveCoreDynamics LLC · Effective 13 October 2026 · Last updated 13 October 2026 · Version 2026-10-13

1. Who we are and what this policy covers

ÜrTC is made by CaveCoreDynamics LLC, a limited liability company registered in Georgia, USA (“CaveCoreDynamics”, “we”, “us”). We decide how and why the personal information described here is used, so we are its “controller”.

This policy covers the ÜrTC app on the web at urtc-app.web.app, our Android and iOS apps when they are available, and our company website, cavecoredynamics.org. It explains what we collect, why, who helps us process it, how long we keep it, and the choices you have. The Terms of Service and the Account deletion page form part of the same set of documents.

2. What we collect, feature by feature

You can use ÜrTC without an account, with a free account (Silver), or with Diamond. What we collect depends on the features you use.

Your account

• Signing up with email: your email address, the username you choose and your password. Passwords are handled by Google Firebase Authentication. We never see or store them.
• Signing in with Google: Google shares your name, email address and profile picture with us.
• What you add to your profile: a short bio, and optional traveller details (title, first and last name, date of birth, gender and phone number) that pre-fill booking checkout. They are stored only if you save them.
• Travel preferences: things you ask Apollo to remember, such as your home airport, a favourite seat, cabin or airline, and which airlines' frequent-flyer programs you belong to (never your membership number).
• Account records: your plan (Guest, Silver, Diamond or Professional), your free-trial dates (and, so each person gets one free trial, a one-way code made from your email address with a secret key, not the address itself), which version of our terms you accepted and when, and whether you want marketing emails.

We use this to run your account, keep your data in sync across your devices, apply your plan and contact you about your account. For example, Firebase sends the email that confirms your address.

Using ÜrTC without an account

As a guest, your trips, saved places, Apollo chat history and settings are stored only on your device. We don't keep copies on our servers, and we can't recover them if you clear your browser data. The app gives your device a random guest ID so it can keep your guest data apart from an account's. If you create an account on that device, ÜrTC moves your guest trips and saved places into it. If you sign in to an account you already have, it asks you first.

Some features still reach our servers and partners while you're a guest, such as Apollo's replies, flight status and weather. What they receive is described below. To keep the free daily limit fair, our server counts a guest's Apollo messages on a random guest pass it gives your device (it says nothing about you), and caps all guests on one IP address together.

Trips, places, notes and budgets

When you're signed in, the trips you create are stored in your account. That covers trip names, dates, destinations and number of travellers, flights you add, places you save to a trip, notes (including notes Apollo writes for you), budgets and expenses, and travel references you add, such as a hotel or train booking reference. Places you bookmark with the Saved button are stored in your account too. We use this only to show, sync and help you plan your trips.

Feedback and requests you send us in the app, such as the reason you give when you cancel Diamond, or asking to be told when a feature launches, are stored with your account ID so we can act on them. They're deleted when you delete your account.

Please don't put passport numbers, card numbers or health information in trip notes. ÜrTC doesn't need them, and notes aren't built to protect that kind of information.

Apollo, our AI companion

Apollo is powered by Google's Gemini models. When you message Apollo, the app sends the following to Google through our server:

• your message and the recent conversation (up to the last 20 messages);
• a summary of your trips (such as names, dates, destinations, flights, saved places, notes and budget figures) so Apollo can answer questions about them;
• your home airport and travel preferences, such as airlines, seats or cabins you prefer and which airlines' frequent-flyer programs you belong to (never your membership number);
• your first name, if you've given one (from your traveller details or the name on your account);
• short notes you've asked Apollo to remember about you (you can see and delete them under What Apollo remembers, the paw button at the top of the Apollo chat);
• the flight you last looked at, if you viewed it in the past 48 hours, and the last city you browsed in Explore;
• today's date, plus the results of anything Apollo looks up or does for you, such as a live flight status.

Apollo doesn't receive your email address, your password, or the date of birth, gender and phone number in your traveller details.

When you ask, Apollo can also act for you. He can create or update a trip, add notes and expenses, look up a flight or search fares. If you ask him to remember a preference, such as your home airport or a favourite seat, he saves it with your account (or on your device if you're a guest), and you can change or remove it. Our other AI features send data in the same way. “Apollo's take” on a place sends Google the place's name and public details. Trip notes, stories and budget tips send the contents of that trip. Spoken replies send the text Apollo is about to say.

Google doesn't train on your chats. We use the Gemini API under Google's terms for paid services. Under those terms, Google does not use your prompts or Apollo's responses to train or improve its products. It keeps them for a limited time, only to detect misuse and to meet legal requirements. Some features use Google Search to find current information, for example local news or Apollo checking the web. For those requests, Google's search-grounding terms let it keep the request and answer for up to 30 days, to produce the search results and to test and fix the systems behind them.

Your chat history. If you're signed in, your conversation with Apollo is saved to your account so it follows you across devices, and a copy is kept on your device. A guest's chat stays on the device only. You can erase the history at any time with the clear-chat button (the trash icon) at the top of the Apollo chat. That removes both the device copy and the copy in your account. We don't read your conversations unless you ask us to look into a problem, we need to investigate misuse, or the law requires it. We don't use your chats to train AI models.

Daily limit. Free plans include 4 Apollo messages a day. Our server counts messages against your account, or, if you're a guest, against a random guest pass stored on your device, with a shared cap for all guests on one IP address. Clearing your device's data gives you a new pass, but a network can only get a few new passes a day.

Apollo can be wrong. Don't share anything in a chat that you wouldn't want Google to process, such as passwords or card numbers.

Talking to Apollo (voice mode)

Voice mode is part of Diamond. Your browser or phone asks your permission before ÜrTC can use the microphone. While voice mode is open, the sound from your microphone streams directly from your device to Google's Gemini Live service so Apollo can hear you and answer out loud. The connection uses a short-lived access key from our server. Apollo may also be given the same kind of trip context as in chat. We don't record or store the audio, and we don't save the on-screen transcript of Apollo's replies (you can share it yourself with your device's share button). Closing voice mode ends the session and turns off the microphone.

Your microphone may also pick up people near you, so use voice mode where you're comfortable being heard.

Location

ÜrTC asks for your device's location only through your browser's or phone's own permission prompt, and only after you've accepted our terms. You can say no and pick a city by hand instead. You can change your mind at any time in your device settings.

If you allow it, your location is used to:

• work out which city you're in, show places around you with walking times, and draw the “you are here” dot on the map (Google Maps Platform receives your coordinates for this);
• show local weather and air quality (OpenWeather and, for air quality, Google receive the coordinates through our server, rounded to a few kilometres);
• find your nearest airport for flight searches (FlightAware receives the coordinates through our server).

While ÜrTC is open, the app may keep checking your location so “Around You Now” stays current. That stops when you close the app or switch off location access.

We never store your GPS coordinates on our servers or link them to your account. Your device keeps the name of the last city you browsed and your home airport code, not your coordinates. Advertising partners never receive your GPS location. Like every website you visit, they can estimate your rough area from your IP address. That's one reason partner scripts load only if you allow them (see Partner offers and ads).

Flight tracking and flight alerts

Flight information comes from FlightAware (AeroAPI). To look up a flight, an airport board or a route, our server sends FlightAware the flight number, airline, airports or dates you searched. It never sends your name, email or account ID. Our server briefly caches FlightAware's answers so the same lookup isn't paid for twice. The cache holds flight data, not information about you.

Flight alerts are a Diamond feature. When you set one, we register the flight (or route) and the dates it covers with FlightAware, together with our server's address, and we store the alert in your account so we know whose devices to notify. To deliver alerts, your browser or phone gives us a push token, which is a random address for that device from Google Firebase Cloud Messaging. We store the token in your account. Alerts travel through Google's push service and, on Apple devices, Apple's push service. A device's token is removed when you log out on that device, when it stops working, or when you delete your account. You can switch off notifications in your device settings at any time.

Your device remembers the last flight you viewed and your last flight search. That lets the app pick up where you left off and lets Apollo understand what you mean by “my flight”.

Booking flights (preview)

Flight search and booking in ÜrTC are provided through Duffel Technology Ltd, a UK company that connects travel apps to airlines. Booking is currently a preview. It runs on Duffel's test system: no ticket is issued, no payment is taken and no airline receives your details. Duffel does receive what you enter.

• Searching: our server sends Duffel the airports, dates, number of passengers and cabin you choose.
• Checking out: for each passenger, our server sends Duffel the title, first and last name, date of birth, gender, email address and phone number, plus any seats you pick and any frequent-flyer number you enter. Airlines need these to issue a ticket.
• Once booking is live: Duffel passes the passenger details to the airline that sells or operates your flight. The airline uses them under its own privacy policy, for example to issue the ticket, check you in and meet government passenger-data rules.

Our servers never keep passengers' dates of birth, gender, email addresses or phone numbers. Our booking record, which we keep for our accounts, holds the booking reference, airline, number of passengers, prices and date, and your account ID (you need to be signed in to book), but no names. Your account also keeps its own copy of each booking you make, so you can find it again on any device: the booking reference, the flights, the passengers' names, any seats, e-ticket numbers, the fare's rules (refunds, changes and bags) and the total. Only you can read it, and it's deleted when you delete your account. If you cancel a booking in ÜrTC, we record the airline's cancellation quote (the refund and when the quote expires) and when you confirmed it, and mark the booking cancelled. ÜrTC also adds each booking to one of your trips: the flights, the booking reference, the passengers' names and the total price. Like any trip, it's deleted when you delete the trip or your account. Your device also keeps your last 50 bookings (including passenger names, flights and booking references) so you can see them in the app, and it remembers which airlines you choose so it can rank results for you.

If you enter details for other people, such as family members, make sure they're happy for you to do so. If a passenger is a child, you must be their parent or guardian, or have that person's permission. Duffel and the airline keep passenger details under their own policies, and deleting your ÜrTC account doesn't delete them there. To make a request about that data, contact Duffel or the airline. We're happy to help if you email us.

ÜrTC also keeps an anonymous price history for each route: the cheapest fares seen in searches, with nothing about who searched. We use it to tell you whether today's fares look high or low.

Subscriptions and payments

Diamond is sold on the web through Stripe. When you subscribe, you enter your payment details on Stripe's secure checkout page, not in ÜrTC, so we never see or store your full card number. We pass Stripe your ÜrTC account ID so your payment is linked to your account. Stripe then tells us your customer reference, which plan you bought and whether your subscription is active, and we store those in your account so Diamond switches on. If you pay before you have an account, we use the email address you gave Stripe to attach Diamond when you sign up or sign in with that email.

Stripe also uses payment and device information to prevent fraud, under its own privacy policy. Manage Billing in the app opens Stripe's billing page, where you can update your card, see invoices or cancel.

If we add store billing to our iOS and Android apps, purchases made there will be handled by Apple or Google under their own terms. We'll update this policy before that starts.

Crash reports and service logs

When something breaks in the app, it sends us a short crash report so we can fix the problem. The report contains the error message and technical trace (both shortened), the app version and build, the screen you were on, your browser and device type, whether you were online, the time, and your account ID if you're signed in. Before a report leaves your device, the app removes email addresses and the details after a “?” or “#” in web addresses (where searches and codes live). The app sends at most five reports per visit. Reports are stored in Google Firebase in the United States and deleted after 90 days.

Like all web services, our servers on Google Cloud log each request. A log entry includes your IP address, browser type, the time and the address requested, which can include a flight number or, for a nearest-airport lookup, map coordinates. Some of our own log entries also note an account ID, for example when a flight alert is delivered. We use logs to keep ÜrTC secure and working, and they are deleted after 30 days.

Apart from these crash reports, the app doesn't use analytics or crash-reporting products such as Firebase Analytics or Crashlytics, session-recording tools or your device's advertising ID. If we ever add one, we'll update this policy first.

Partner offers and ads (free plans only, and only if you allow them)

Diamond subscriptions pay for ÜrTC, along with partner offers on the free plans (using ÜrTC as a guest, or with a free Silver account). Here is exactly how partner offers work:

• Partner links. Free plans may show a few offers for hotels, car rentals and activities from partners such as Stay22, DiscoverCars, Booking.com, GetYourGuide and Viator. They are labelled as partner offers, and we may earn a commission if you book. Nothing is sent to a partner until you tap an offer. When you do, you go to the partner's site with our referral code and the destination or dates you were looking at, and that site handles your information under its own policy. Some ordinary links, such as “Find hotels” in a trip, can also carry our referral code on any plan. When they do, they're marked as partner links.
• Partner scripts. ÜrTC may load code from three partners, but only if you choose “Accept & allow partner offers” and you're on a free plan, only on screens that show an offer, and never in our iOS and Android apps. The partners are Google AdSense (ads), Stay22 (which turns hotel and travel links on the page into Stay22 partner links) and Viator, a Tripadvisor company (activity offers). These partners can set cookies and receive your IP address (which reveals your approximate area), browser and device details, the page you're on and what you click. They use this to show and measure ads and to credit bookings. Google explains its part in “How Google uses information from sites or apps that use our services”, and you can turn off personalised Google ads at My Ad Center.
• Never for Diamond. Diamond members, including during the free trial, never see ads or partner-offer placements, and partner scripts never load for them.
• Your choice. Partner scripts won't load if you choose “Accept, essentials only” on the first screen, or if you later turn off Partner offers in gear icon → Settings → Privacy choices. If scripts were already loaded, they stop the next time you open or reload the app. You can delete cookies partners have set in your browser settings. If your browser sends a Global Privacy Control (GPC) signal, we treat it as a choice of “Accept, essentials only”.

Emails from us

• Account emails, such as the one that confirms your address when you sign up and password-reset emails, are sent for us by Google Firebase.
• Marketing emails (travel deals and product news) go only to people who opt in: by ticking the box when they sign up (it starts unticked), or by switching on “Travel deals by email” in gear icon → Settings → Privacy choices. Turning the switch off stops them, and every marketing email will carry an unsubscribe link. We don't share your email address with partners for their marketing.
• Support: when you email us, we use your message and address to help you. Our email runs on Google Workspace.

What ÜrTC keeps on your device

What we don't do

• We don't sell your personal information.
• We don't use analytics SDKs, session recording or advertising IDs in the app, and we don't track you across other companies' apps or sites.
• We don't store your GPS location on our servers.
• We don't ask for or store passport or known-traveller numbers. If booking ever needs them, we'll update this policy before we ask.
• We don't use your data to train AI models, and our AI provider doesn't either (see Apollo).
• We don't make decisions about you that have legal or similarly significant effects purely by automated means. Apollo's ranking of fares is a suggestion, and you always choose.

3. Our legal reasons for using your information

Privacy laws in the EEA, the UK and Switzerland require a legal basis for each use of personal information. These are ours:

4. Who we share it with

We share personal information only with the providers below, which process it to run ÜrTC, and in the situations described after the table. We don't sell it.

We may also disclose information when the law requires it (for example, a valid court order), or to protect the safety, rights or property of our users, ourselves or others. If our business is merged, acquired or sold, your information may be transferred as part of that deal. This policy would keep applying to it, and we'll tell you before it becomes subject to a different policy.

5. How long we keep it

Deleting data from our database takes effect immediately. Encrypted copies can remain in Google Cloud's internal disaster-recovery systems for a limited time before they are overwritten (Google says this finishes within about six months). We can't read or restore individual accounts from those copies.

6. Your rights and choices

For everyone

• See and correct: you can edit your profile, traveller details and trips in the app.
• Delete: you can delete individual trips, places, alerts and your Apollo history in the app, or your whole account (see Account deletion).
• Get a copy: email us and we'll send your account data in a machine-readable format (JSON).
• Partner offers: turn them on or off at any time in gear icon → Settings → Privacy choices.
• Marketing emails, location, notifications and microphone: turn them off in Privacy choices or in your device settings.

If you're in the EEA, the UK or Switzerland

Under the GDPR and the UK GDPR, you have the right to access, correct or delete your personal information, to restrict or object to how we use it, to receive it in a portable format, and to withdraw your consent at any time (this doesn't affect anything we did before you withdrew it). You can also complain to your local data protection authority. In the UK, that's the Information Commissioner's Office (ico.org.uk). We'd appreciate the chance to put things right first.

If you're in California or another US state with a privacy law

California residents, and residents of other states with similar laws, have the right to know what personal information we collect, use and disclose, and to get a copy of it. They can also correct it, delete it, and opt out of the “sale” or “sharing” of personal information (including sharing for cross-context behavioural advertising). Using any of these rights won't lead to different treatment. We give these rights to everyone in the US.

In the past 12 months we collected these categories of personal information:

• Identifiers: name, email, account ID, IP address and push tokens.
• Customer records: date of birth, gender and phone number for booking.
• Commercial information: plan, subscription and booking records.
• Internet activity: crash reports and server logs, plus interactions with partners, but only if you allowed partner offers.
• Geolocation: precise location, used to provide the feature you asked for and never stored by us.
• Audio: from voice mode, not stored.
• Content: your trips and Apollo chats.

Section 2 describes the sources and purposes. Section 4 lists the recipients, and section 5 gives the retention periods.

Do not sell or share my personal information

We don't sell personal information for money, and we don't knowingly sell or share the information of anyone under 16. If you allow partner offers, the partner scripts described in section 2 can collect information that some state laws treat as “selling” or “sharing” for advertising. To opt out, choose “Accept, essentials only” on the first screen, or turn off Partner offers in gear icon → Settings → Privacy choices. We also honour Global Privacy Control. California law treats precise location as sensitive information. We use it only to provide the feature you asked for, never to infer things about you.

How to make a request

Email privacy@cavecoredynamics.org from the email address on your account and tell us what you'd like.

• We'll confirm it's you by replying to that address. If you can't use it, we'll ask for details only the account holder would know, and we won't act until we're satisfied.
• You can use an authorised agent, with your signed permission.
• We answer within 30 days. If a request is complex, we may need longer, as the law allows, and we'll tell you why.
• If we turn down a request, you can appeal by replying with the word “Appeal”. We'll review the decision and send you our answer and reasons in writing within 45 days.

7. International transfers

We're based in the United States, and your account data is stored in Google Cloud data centres in the United States. Some providers process information in other countries: Duffel and OpenWeather are in the United Kingdom, Stay22 is in Canada, and Google may process Gemini and Maps requests in any country where it operates. When you use ÜrTC from outside the US, you send your information to us in the US, where privacy laws may differ from those where you live. When our providers move personal information out of the EEA, the UK or Switzerland, they rely on recognised safeguards such as adequacy decisions, the EU–US Data Privacy Framework (and its UK and Swiss extensions) or Standard Contractual Clauses.

8. Children

ÜrTC isn't meant for children. You must be at least 16 to use ÜrTC or create an account. To buy Diamond or book a flight, you must be 18, or have a parent's or guardian's permission. We don't knowingly collect information from anyone under 16. If you believe a child under 16 has given us information, email privacy@cavecoredynamics.org and we'll delete it. A parent or guardian may enter a child's details as a passenger when booking. We use those details only to make that booking (see Booking).

9. Security

• Every connection to ÜrTC and to our providers is encrypted in transit (HTTPS/TLS), and Google Cloud encrypts stored data.
• Database rules let each account read and change only its own data. Payment, booking and log records can be changed only by our servers.
• The keys to our paid data services (flights, booking, weather and AI) are kept on our servers, not in the app. The Google Maps key has to be visible to your browser, as on every site that shows a Google map, so we restrict what it can be used for.
• Card details go straight to Stripe and never touch our servers.
• You have to sign in again before you can delete an account.
• Only our two founders have administrative access to account data, and they use it only to run and support ÜrTC.

We're a small company and don't hold formal security certifications. Trips and chats aren't end-to-end encrypted, because our systems need to read them to run the features you ask for. No system is perfectly secure. If a breach affects your personal information, we'll tell you and the authorities as the law requires.

10. Our company website

Squarespace hosts cavecoredynamics.org. It sets the cookies the site needs to run, and it collects basic visit information (such as IP address, browser and pages viewed) for its own statistics. The site loads its fonts from Google Fonts, which receives your IP address and browser details. The site has no forms: its contact buttons open your own email app, and the site doesn't store what you write. This policy covers the website too.

11. Changes to this policy

When we change this policy, we'll update the date and version at the top. A material change might be a new kind of information, a new purpose or a new kind of partner. For material changes, we'll show you a summary the next time you open ÜrTC and ask you to accept before you continue, and we'll email account holders before the change takes effect. We record which version you accepted, on your device and in your account if you're signed in. Earlier versions are available on request.

Version history

• 13 October 2026 (version 2026-10-13): rewritten from the ground up as the single policy for the app, urtc-app.web.app and cavecoredynamics.org. It adds exactly what Apollo sends to Google (and that Google doesn't train on it), voice mode, the passenger details sent to Duffel, partner offers only with your consent and never for Diamond, crash reports, a retention table, your rights (including the do-not-sell-or-share choice), international transfers, and the minimum age of 16. It removes claims about analytics, crash-reporting tools, advertising IDs and app-store billing that ÜrTC doesn't use.
• Earlier texts (dated 22 June 2026, July 2026 and 4 July 2026) were separate versions in the app, on this site and on cavecoredynamics.org. This version replaces all of them.

12. Contact us

CaveCoreDynamics LLC, Georgia, USA.

• Privacy questions and requests: privacy@cavecoredynamics.org
• Help with the app, billing and bookings: support@cavecoredynamics.org

Terms of Service

CaveCoreDynamics LLC · Effective 13 October 2026 · Last updated 13 October 2026 · Version 2026-10-13

1. The agreement

These Terms of Service (the “Terms”) are an agreement between you and CaveCoreDynamics LLC, a limited liability company registered in Georgia, USA (“CaveCoreDynamics”, “we”, “us”). They cover the ÜrTC app on the web, our Android and iOS apps when they are available, and our website, cavecoredynamics.org (together, “ÜrTC”). You agree to these Terms by accepting them on ÜrTC's first screen, by creating an account, or by using ÜrTC. Our Privacy Policy explains how we handle your information.

Section 21 contains an agreement to resolve disputes by individual arbitration and a waiver of class actions. It doesn't apply to consumers in the EU, EEA, UK or Switzerland, and anyone can opt out within 30 days.

2. Who can use ÜrTC

• You must be at least 16 years old to use ÜrTC or create an account.
• To buy Diamond or book a flight, you must be 18 or older, or have permission from a parent or legal guardian who agrees to these Terms for you and is responsible for the purchase.
• You may not use ÜrTC if US law prohibits you from receiving it, for example because of sanctions.

3. Your account

• Keep your sign-in details secure. You're responsible for what happens in your account. If you think someone else has used it, tell us at support@cavecoredynamics.org.
• Give accurate information, especially passenger details for a booking, which must match the ID each passenger will travel with.
• Each account is for one person. Don't create accounts in bulk or to get extra free trials.
• You can delete your account at any time. See Account deletion.

4. Plans and what Diamond includes

• Guest: use ÜrTC without an account. Your trips stay on your device, Apollo answers up to 4 messages a day, and you may see partner offers.
• Silver: a free account. Your trips sync across devices, Apollo answers up to 4 messages a day, and you may see partner offers.
• Diamond: our paid plan. It includes everything in Silver plus the benefits below.
• Professional: for travel-industry customers, arranged individually in writing. Ask at support@cavecoredynamics.org.

Diamond includes exactly these benefits:

1. Unlimited Apollo chat (free plans have 4 messages a day).
2. Apollo voice conversations.
3. Live flight alerts: a push notification when a flight you set an alert on has its flight plan filed, departs, lands, is cancelled or is diverted, whenever airlines and FlightAware report it. A delay shows in those pushes (for example, a departure 40 minutes late). There is no separate gate-change alert.
4. No ads and no partner-offer placements.

Push alerts need notifications to be allowed on your device. Some browsers can't receive them, for example Safari on iPhone unless ÜrTC has been added to the Home Screen. “Unlimited” means no daily cap for normal personal use. We may slow down or pause automated or abusive traffic.

The free trial

• New accounts get 7 days of Diamond free. No card is needed. The trial starts once the account's email address is confirmed: tap the link we email you, or sign in with Google or Apple, which confirm it for us.
• During the trial you get everything in Diamond. The app shows how many days are left and when the trial ends.
• When the trial ends, your account goes back to Silver automatically. Nothing is charged, and nothing converts to a paid plan unless you choose one.
• Each person can have one free trial. We may refuse or end a trial on accounts created to get repeat trials.

5. Prices, renewal and cancellation

• Prices: Diamond costs $4.99/week, $13.99/month or $129.99/year. The annual plan is the best value, about 23% less than twelve months at the monthly price. Prices are in US dollars. Stripe's checkout may show the equivalent in your local currency, plus any taxes that apply, and the total shown at checkout is what you pay.
• Automatic renewal: Diamond renews automatically at the end of each week, month or year, charging the payment method you used, until you cancel.
• Cancelling: you can cancel anytime in the app at gear icon → Plans → Manage Billing, which opens Stripe's secure billing page. You keep Diamond until the end of the period you've paid for, and you won't be charged again. If you can't reach Manage Billing, email support@cavecoredynamics.org and we'll cancel for you.
• Where you buy: today, Diamond is sold only on the web, through Stripe. If Diamond is offered inside our iOS or Android apps, purchases made there will be billed, cancelled and refunded by Apple or Google under their rules and managed in your App Store or Google Play account.
• Price changes: we'll email you at least 30 days before a new price applies to your subscription. The new price takes effect at your first renewal after that notice. If you don't want it, cancel before then.
• Failed payments and disputes: if a renewal payment fails, Stripe may try again. If the payment can't be collected, Diamond ends. If you dispute a charge with your bank, we may pause Diamond while the dispute is open. Please contact us first, because we'd rather fix it.

6. Refunds

We're the seller, so refunds come from us, not from Stripe. To ask for one, email support@cavecoredynamics.org from the email address on your account (or the one you used at checkout), with the date and amount of the charge.

• Annual plans: ask within 14 days of an annual charge (a first purchase or a renewal) and we'll refund that charge in full.
• Weekly and monthly plans: we don't refund part-used periods. Cancelling stops the next charge.
• Our mistakes: if you were charged twice, charged after cancelling, or couldn't use Diamond because of a fault on our side, we'll refund the affected charge.
• Customers in the EU, EEA, UK or Switzerland: you have a legal right to cancel within 14 days of buying and get a refund. If you started using Diamond during those 14 days, we may keep an amount in proportion to the days you used it, where the law allows.
• Deleting your account cancels your subscription immediately, and Diamond ends at that moment. Deleting doesn't trigger a refund by itself, but the rules above still apply. Email us from the same address.
• Professional plans follow the written agreement for that plan.

Refunds go back to the original payment method, usually within 5–10 business days. Nothing in these Terms limits any refund rights you have under the law where you live.

7. Booking flights

Booking is a preview today

Booking in ÜrTC is a preview that runs on our booking partner's test system. Fares may be test fares. No ticket is issued, no payment is taken and no seat is reserved. Nothing you do in the preview creates a booking with an airline, and any screen that looks like a confirmation is only a demonstration. Passenger details you enter are still sent to Duffel, as the Privacy Policy explains.

When booking goes live

The terms in this part apply only after we announce that booking is live and you complete a paid booking. We'll show you the booking terms again at checkout.

• Our role: ÜrTC helps you find and book flights. Your ticket, and your contract of carriage, are with the airline that sells or operates the flight. We place your booking through Duffel Technology Ltd, which connects us to airlines. We're not an airline and we don't operate flights.
• Airline rules: each fare comes with the airline's fare rules (for example, whether it can be changed or refunded, and any fees) and the airline's conditions of carriage. Before you pay, we'll show you the key fare conditions and a link to the airline's conditions of carriage, and ask you to accept them. They form part of your agreement with the airline.
• Payment: you'll pay ÜrTC through a secure payment provider before any ticket is issued. We never issue a ticket without a confirmed payment for the full amount shown at checkout. That amount includes taxes, airline fees, seats and any ÜrTC booking fee, and we'll always show it before you pay.
• Your details and documents: passenger names must match the travel document each passenger will use. You're responsible for passports, visas, health requirements and getting to the airport on time. A wrong name can make a ticket unusable, and airlines may charge to correct it.
• Changes and cancellations: changes, cancellations and refunds follow the fare rules and the law. If the airline or the law gives you a free cancellation window (for example, within 24 hours of booking for many US flights), we'll tell you at checkout how to use it. If the airline changes or cancels your flight, we'll pass on what we hear and help with your options. Refunds for flights the airline cancels are decided by the airline, under its rules and the law.
• Hazardous materials: federal law forbids carrying hazardous materials aboard aircraft, in your luggage or on your person. We'll show the required notice before you book.
• Seats and extras: seats and bags bought with your ticket are provided by the airline, which can change them.

For help with a booking, email support@cavecoredynamics.org.

8. Apollo and AI features

• Apollo is an AI companion powered by Google Gemini. What he says can be wrong, incomplete or out of date, including prices, opening hours, travel rules and flight times. It isn't professional travel, legal, medical, financial or immigration advice. Check anything important with the airline, the venue or an official source.
• When you ask, Apollo can change things in your account: he can create trips, add flights, notes and expenses, or open a screen for you. Check what he saved. You can edit or delete it.
• Amounts Apollo suggests, such as budgets, are estimates. Fares Apollo finds in the booking preview can't be booked.
• Don't use Apollo to create anything illegal, harmful or abusive, or try to get around his safeguards. Google's Generative AI Prohibited Use Policy also applies.
• Free plans include 4 Apollo messages a day. Diamond has no daily cap for normal personal use.

9. Flight, weather and map information

ÜrTC shows flight, airport, weather, air-quality, map and place information from providers including FlightAware, OpenWeather, Google and Duffel. It's for general information and planning only. ÜrTC is not a certified aviation product. Don't use it for navigation, flight planning or any safety-critical decision. Information can be delayed, incomplete or wrong, and alerts can arrive late or not at all. Always confirm flight status, gates and travel requirements with your airline, the airport and official sources. ÜrTC isn't affiliated with or endorsed by any airline or airport.

10. Partner offers and links

Free plans may show partner offers for hotels, car rentals and activities. They're labelled as partner offers, and we may earn a commission if you book. Some ordinary links, such as “Find hotels” in a trip, can also carry our referral code on any plan, and are then marked as partner links. If you allow partner offers, a partner script (Stay22) may also turn hotel and travel links on the page into partner links. Partners set their own prices, availability and discounts, and anything you book with them is under their terms. Showing an offer isn't a promise about the partner's service. Diamond members never see ads or partner-offer placements.

11. Acceptable use

You agree not to:

• use ÜrTC to break the law or infringe anyone's rights;
• access, or try to access, other people's accounts or data, or probe, scan or attack our systems;
• scrape, bulk-copy, resell or republish ÜrTC's data (including flight and weather data), or use ÜrTC to build a competing product;
• use bots or scripts, get around daily limits, or create accounts to get extra trials;
• reverse-engineer the app, except where the law allows it;
• upload anything malicious, infringing, defamatory or abusive, or impersonate anyone;
• misuse booking, for example with speculative or fraudulent bookings, or bookings for people who haven't agreed.

12. Your content

Your trips, notes and messages are yours. You give us a worldwide, non-exclusive, royalty-free permission to store, process and display them only to run ÜrTC for you, including sending them to the providers named in the Privacy Policy. This permission ends when you delete the content or your account, except for copies we're required to keep. If you send us feedback or ideas, we may use them without owing you anything.

13. Our intellectual property and your licence

ÜrTC, including the app, its design, the ÜrTC and Apollo names and logos, and Apollo's character, belongs to CaveCoreDynamics LLC or our licensors. We give you a personal, non-exclusive, non-transferable, revocable licence to use the app for your own non-commercial purposes, on devices you own or control, under these Terms and, if you got the app from an app store, that store's usage rules. We reserve all other rights.

Data from our providers belongs to them. Flight data contains AeroAPI data © FlightAware, weather data comes from OpenWeather, and Google Maps content, photos and reviews belong to Google and their authors.

14. Third-party services

ÜrTC relies on services run by other companies, which the Privacy Policy lists. We're not responsible for those services, and your use of them may be governed by their own terms. The Google Maps features in ÜrTC are subject to the Google Maps/Google Earth Additional Terms of Service and the Google Privacy Policy. By using those features, you agree to them.

15. Apple App Store: additional terms

If you downloaded ÜrTC from Apple's App Store, you acknowledge and agree that:

• These Terms are between you and CaveCoreDynamics LLC only, not Apple. Apple is not responsible for the app or its content.
• Your licence is limited to using the app on Apple-branded products you own or control, as permitted by the Usage Rules in the App Store Terms of Service, except that other accounts associated with you through Family Sharing or volume purchasing may also access it.
• Apple has no obligation to provide maintenance or support for the app. We are responsible for support (section 23).
• If the app fails to conform to any applicable warranty, you may notify Apple, and Apple will refund the purchase price (if any) for the app. To the maximum extent permitted by law, Apple has no other warranty obligation for the app. Any other claims, losses, liabilities, damages, costs or expenses caused by a failure to conform to a warranty are our responsibility, to the extent these Terms don't exclude them.
• We, not Apple, are responsible for addressing any claims by you or a third party relating to the app or your use of it, including product liability claims, claims that the app fails to meet any legal or regulatory requirement, and claims under consumer protection, privacy or similar laws.
• If a third party claims that the app or your use of it infringes their intellectual property, we, not Apple, are responsible for investigating, defending, settling and discharging that claim.
• You represent that you are not located in a country subject to a US Government embargo, or designated by the US Government as a “terrorist supporting” country, and that you are not on any US Government list of prohibited or restricted parties.
• You must comply with any third-party terms that apply when you use the app, such as your mobile carrier's.
• Apple and its subsidiaries are third-party beneficiaries of these Terms. Once you accept these Terms, Apple has the right to enforce them against you as a third-party beneficiary.

16. Google Play: additional terms

If you downloaded ÜrTC from Google Play, the Google Play Terms of Service also apply to your use of Google Play. These Terms are between you and CaveCoreDynamics LLC only. Google isn't responsible for the app and has no obligation to support it.

17. Suspension and ending your use

You can stop using ÜrTC and delete your account at any time. We may suspend or close an account that breaks these Terms or the law or puts others at risk, or where the law requires us to. We'll tell you why unless the law or safety concerns prevent it. If we close your account without cause, or stop offering ÜrTC, we'll give you at least 30 days' notice where we reasonably can and refund any prepaid time you haven't used. Sections that by their nature should continue after your use ends survive, including those on intellectual property, disclaimers, liability, indemnity and disputes.

18. Disclaimers

ÜrTC is provided “as is” and “as available”. To the extent the law allows, we make no warranties beyond those in these Terms, including implied warranties of merchantability, fitness for a particular purpose, accuracy and non-infringement. We don't promise that ÜrTC will be uninterrupted, error-free or always accurate. If you're a consumer, you may have legal rights that can't be excluded, and nothing in these Terms affects them.

19. Limitation of liability

To the extent the law allows, we're not liable for indirect, incidental, special, consequential or punitive damages, or for lost profits, data or goodwill. Our total liability for all claims relating to ÜrTC is limited to the greater of (a) what you paid us in the 12 months before the claim arose or (b) US$50.

These limits don't apply to liability that can't be limited by law, such as liability for fraud, gross negligence, wilful misconduct, or death or personal injury caused by negligence. They also don't limit an airline's obligations to you under your ticket.

20. Indemnity

If you break these Terms or the law when using ÜrTC, and someone makes a claim against us because of it, you'll cover our reasonable costs of that claim, including reasonable legal fees, to the extent the law allows. This doesn't apply to consumers where the law doesn't permit it.

21. Disputes and governing law

Talk to us first

Most problems can be fixed with an email. Before starting a claim, send a written notice to support@cavecoredynamics.org with the subject “Dispute”. Describe the problem and what you'd like us to do. We'll do the same by emailing the address on your account. We'll both try in good faith to resolve it within 30 days of the notice.

Binding individual arbitration

If we can't resolve it within 30 days, you and we agree to settle any dispute arising from or relating to these Terms or ÜrTC by binding individual arbitration. The arbitration will be run by the American Arbitration Association (AAA) under its Consumer Arbitration Rules (adr.org), and its legal seat will be Fulton County, Georgia. Hearings can take place by video or phone, or on documents alone, so you won't have to travel. For any claim of US$10,000 or less that you bring, we'll pay all AAA filing, administration and arbitrator fees, unless the arbitrator finds the claim frivolous. Otherwise, fees follow the AAA Consumer Arbitration Rules. The arbitrator can award the same individual relief a court could. The Federal Arbitration Act governs this section. You and we each give up the right to a jury trial.

Small-claims court

Instead of arbitration, either of us can bring an individual claim in small-claims court, in the county where you live or in Fulton County, Georgia, if the claim qualifies. Either of us can also ask a court to stop someone from infringing intellectual property or accessing our systems without permission.

No class actions

Claims can only be brought individually, not as a plaintiff or class member in any class, collective or representative proceeding. If a court decides this waiver can't be enforced for a particular claim, that claim (and only that claim) will be decided in court, not in arbitration.

Opting out

You can opt out of arbitration and the class-action waiver within 30 days of first accepting these Terms. To do so, email support@cavecoredynamics.org with the subject “Arbitration opt-out”, from the email address on your account, or tell us your name and the email you use. Opting out doesn't affect anything else in these Terms. If we change this section later, the change won't apply to a dispute either of us has already notified the other about.

Consumers in the EU, EEA, UK and Switzerland

If you're a consumer living in the European Union, the EEA, the United Kingdom or Switzerland, the arbitration, jury-waiver and class-action parts of this section don't apply to you. You can bring a claim in the courts of the country where you live, and you keep the protection of that country's mandatory consumer laws.

Governing law and courts

These Terms are governed by the laws of the State of Georgia, USA, without regard to its conflict-of-laws rules, except that the Federal Arbitration Act governs the arbitration agreement. Any dispute that isn't resolved by arbitration or in small-claims court will be heard in the state or federal courts located in Fulton County, Georgia, and you and we consent to their jurisdiction. This doesn't apply where the law gives you the right to bring a claim in your local courts.

22. Changes to these Terms

We may update these Terms as ÜrTC changes, and we'll update the date and version at the top when we do. For material changes, we'll show you a summary the next time you open ÜrTC and ask you to accept before you continue. We'll also email account holders at least 14 days before any change that reduces your rights takes effect, although changes needed for legal or security reasons may apply sooner. If you don't agree to a change, you can stop using ÜrTC and cancel. If you have a prepaid plan and the change materially reduces what you get, we'll refund your unused time.

Version history

• 13 October 2026 (version 2026-10-13): one set of Terms for the app, the first-run screen and cavecoredynamics.org. Changes include the minimum age of 16 (18 to buy or book), exact Diamond prices, benefits, trial, renewal, cancellation and refund rules, booking-preview and live-booking terms, one dispute clause (talk first, then individual arbitration with a small-claims option, a 30-day opt-out and home-court rights for EU/UK consumers), and one liability cap.
• Earlier texts (dated June 2026, 22 June 2026 and 4 July 2026) were separate versions on the first-run screen, in the app and on cavecoredynamics.org. This version replaces all of them.

23. General terms and contact

• These Terms, the Privacy Policy and any terms shown at checkout are the whole agreement between you and us about ÜrTC.
• If any part of these Terms can't be enforced, the rest stays in effect.
• If we don't enforce a right straight away, we haven't given it up.
• You can't transfer your account or these Terms. We may transfer them as part of a merger, acquisition or sale of our business, and that won't reduce your rights.
• We're not responsible for delays or failures caused by events beyond our reasonable control, such as outages at our providers.
• We can send you notices in the app or by email to your account address. You can send us notices at support@cavecoredynamics.org.
• These Terms are written in English. If we provide a translation and the two differ, the English version applies unless the law says otherwise.

CaveCoreDynamics LLC, Georgia, USA. We provide support for ÜrTC.

• Help with the app, billing and bookings: support@cavecoredynamics.org
• Privacy and data requests: privacy@cavecoredynamics.org

Account & Data Deletion

CaveCoreDynamics LLC · Effective 13 October 2026 · Last updated 13 October 2026 · Version 2026-10-13

1. Delete your account in the app

1. Open ÜrTC and sign in.
2. Tap the gear icon, then the Account tab.
3. Tap Delete your account. You'll see exactly what will be deleted and what will be kept.
4. Type DELETE, then confirm it's you, either with your password or by signing in with Google again.
5. Tap Delete forever. It takes a few seconds, and the app confirms when it's done.

Deletion is immediate and permanent. There's no waiting period and no undo. If deletion can't be completed, the app will tell you, and you can try again or email us (see section 5).

2. What's deleted immediately

• Your sign-in record, so the account can't be used again.
• Your profile: username, email, bio, traveller details (name, date of birth, gender and phone number), the travel preferences Apollo remembers, plan status, terms acceptance, marketing choice and your devices' push tokens.
• All your trips and everything in them: flights, places, notes, budgets, expenses, travel references and booking receipts.
• Your account's copies of your bookings (booking references, flights, passenger names, seats, e-ticket numbers and fare rules) and the records of any cancellations you made in ÜrTC.
• Your saved places.
• Your flight alerts, both in our database and at FlightAware.
• Your entire conversation history with Apollo.
• Feedback and requests you sent us in the app.
• ÜrTC's copies of your data on the device you delete from.

Before any of this happens, your ÜrTC web subscription is cancelled automatically (see section 4).

3. What we keep, and why

4. Your subscription

• Deleting your account cancels your ÜrTC web subscription immediately. You don't need to cancel first, and you won't be charged again.
• Diamond ends at that moment, even if you've paid for time beyond it. Deleting doesn't trigger a refund by itself, but our refund rules still apply, for example within 14 days of an annual charge, or under your legal right to cancel in the EU or UK. To ask for a refund, email support@cavecoredynamics.org from the same email address.
• Want to keep your account? Cancel your plan instead, in gear icon → Plans → Manage Billing. You keep Diamond until the end of the period you've paid for.
• Removing the app from your phone doesn't delete your account or cancel a subscription. If you ever subscribe through the App Store or Google Play (not available yet), cancel there as well, because we can't cancel store subscriptions for you.

5. Can't sign in? Ask us by email

Email privacy@cavecoredynamics.org with the subject “Delete my account”, from the email address on your account.

• We'll check it's you by replying to that address and asking you to confirm. If you no longer have access to it, we'll ask for details only the account holder would know, and we won't delete anything until we're satisfied.
• Once you've confirmed, we'll delete the same data as the in-app option and cancel your subscription within 30 days, usually much sooner. We'll email you when it's done.

6. Data held by others

• Duffel and airlines: if you booked, the passenger details are held by Duffel Technology Ltd and, for live bookings, by the airline, under their own policies. Deleting your ÜrTC account doesn't delete them there. Ask them directly, and email us if you'd like help.
• Stripe: keeps the payment records it's required to keep (see section 3).
• FlightAware: we delete your alerts there too. If that ever fails, all that remains is a flight number or route and our server's address. Nothing in it identifies you, and it can no longer notify anyone.
• Google Cloud backups: encrypted copies in Google's disaster-recovery systems are overwritten on Google's schedule, within about six months. We can't restore individual accounts from them.
• Partners: if you allowed partner offers, the cookies partners set are stored in your browser. You can delete them in your browser settings.

7. Delete some data and keep your account

• A trip: open it and tap “Delete this trip”, or use the trash icon on the trip card.
• A saved place: tap its bookmark again.
• A flight alert: open your flight alerts and tap the trash icon next to it.
• Apollo's chat history: tap the trash icon at the top of the Apollo chat.
• Traveller details: go to gear icon → Account → Traveller details, clear the fields and save.
• Anything else: email privacy@cavecoredynamics.org.

8. If you use ÜrTC without an account

Guests don't have an account to delete. Your trips, saved places and chat stay only on your device, and we don't hold copies. To remove them, use Clear this device in gear icon → Account, clear this site's data in your browser settings, or uninstall the app.

9. Timing at a glance

10. Questions

Email privacy@cavecoredynamics.org, or read the Privacy Policy for how we handle your information. For billing or refunds, email support@cavecoredynamics.org. This page is operated by CaveCoreDynamics LLC, Georgia, USA.