Trayna Privacy Policy

About this policy

Last updated: 14 October 2026

This policy explains, in plain English, what personal data we collect about you when you use Trayna, why we collect it, what we do with it, and the rights you have over it.

Trayna is a study app made for students, most of whom are aged 15 to 18. Because we know that many of the people using Trayna are children, we have written this policy to be clear and easy to understand, and we have designed the app to protect young people by default. If anything here is unclear, please ask us using the contact details below, and a parent or guardian is always welcome to read this with you.

Who we are and how to contact us

Trayna is provided by Trayna Ltd, a company registered in England and Wales (company number 17204176), trading as "Trayna". Our registered office is 84 Albert Hall Mansions, Kensington Gore, London SW7 2AQ. You can find out more about us at trayna.co.uk.

Trayna Ltd is the "data controller" for the personal data described in this policy. That means we are responsible for deciding how and why your data is used, and for keeping it safe.

If you have any questions about this policy, want to exercise your rights, or have any concern about how we handle your data, please contact us by email at info@trayna.co.uk.

We are registered with the Information Commissioner's Office (the ICO), the UK's data protection regulator.

What personal data we collect and why

We only collect the data we actually need to run the app, help you study, and fix the app when it breaks. We do not collect anything beyond that. Here is every category, in plain English.

Account details: your email address and password, which you use to sign in. Sign-in is handled securely for us by Google Firebase Authentication. We use this to create your account, keep it secure, and let you log in. If you would rather not use a password, you can choose Sign in with Apple or Sign in with Google, and that provider confirms your email address to us so we can find your account.

Your study profile: your first name, your confirmation that you are 13 or older, the exam subject, level and exam board you are studying, your target grade, your exam date, and your study-time preferences. We use this to set up your study plan and personalise the notes, questions and videos we show you.

Your study activity: your progress through topics, your performance and "mastery" data (how well you are doing), and when you were last active. We use this to power the adaptive daily study planner, to show you what to revise next, and to help you keep track of how you are getting on.

How you use the app: as you study, the app sends us a small stream of events so we can see whether the product actually works and where it lets students down. These include: opening the app, which screen you are on, a study session starting, finishing or being left part way, a video starting, finishing, or being left and roughly how far through you were, a question being answered and whether it was right or wrong, an item being skipped, tapping a study reminder, the subscription screen being shown, and a subscription starting. Each event is stamped with your account, the version of the app, and whether you are on iPhone, iPad or Android. These events are entirely ours: they go to our own servers in the UK, no advertising or analytics company is involved, and they are never used to follow you around other apps or websites.

Reporting a question: if you tell us a question is wrong or unclear, we record which question it was, the reason you picked, anything you typed in the box, and your account, so a person can read it and fix the question.

Crashes and errors: when something in the app goes wrong, or the app closes without shutting down properly, it sends us a report so we can fix it. That report holds the error message, the first line of the technical trace, the screen you were last on, the version and update of the app you were running, and your platform. It does not include anything you had written or any picture of your work.

Your devices: a Trayna account can be used on two devices, so we keep one short record for each install: an id the app makes up for that install, the device name your device reports (for example "Lavan's iPad"), the platform and model, the app version, and when we first and last saw it. This exists only to tell your own two devices apart from an account being passed around, and you can see and remove your devices in the app's settings.

How you found us: when you first enrol we record how you came to Trayna, once, and never update it. That can be the answer you give when we ask how you heard about us, the campaign, source, medium or referrer carried on the link you tapped, and a share code if a friend gave you one. On iPhone and iPad we may also send Apple's AdServices attribution token, and on Android the Google Play install referrer: these are anonymous strings from the app stores that tell us which advert or link led to the install, never who you are. We use all of this to learn which of our own efforts reach students. It is not used to build a profile of you and it is not used to target adverts at you.

Your subscription status: if you take out a subscription, the payment itself is handled entirely by Apple, so we never see your card or bank details. We receive your subscription status (which plan is active and until when) through RevenueCat, a service that manages subscription entitlements for us, so the app can unlock the right features for you.

The Trayna app does not show adverts, does not use any third-party analytics or advertising service, and does not track you across other apps or websites. Everything described above is first party: it is collected by Trayna, for Trayna, to run and improve the app, and it is never sold or shared for marketing. That is why the app does not show an App Tracking Transparency prompt: there is no tracking to ask you about.

Our website: trayna.co.uk asks before it sets any cookie that is not essential. Only if you press Accept, Google Analytics sets cookies that record which pages you visit, your device and browser, your approximate area (town or city, never your exact location), and which link brought you to the site. We use this to see which pages help students. Nothing is set before you choose, Google is told never to personalise adverts with it, and you can change or withdraw your choice at any time on our cookie policy page. This is based on your consent, it is kept for up to 14 months, and it is not linked to your Trayna account. Google explains how it uses this data at policies.google.com/technologies/partner-sites.

Reminders: if you allow notifications, we send occasional study reminders to your device. You can turn these off at any time in your device settings.

Founding-member list: if you join the founding-member list or the Android waitlist on our website, we collect the email address you give us, the time you joined, and the page you signed up from. We use this to email you about Trayna's launch, pricing and availability, and for nothing else. This is based on your consent, and you can unsubscribe or ask us to delete your email at any time by writing to info@trayna.co.uk.

What the app does on your device

Some things the app does never leave your device at all. We describe them here so you know they happen.

Your calendar: if you turn calendar sync on, and only after you grant permission, the app reads the events already in your device's calendar so it can work out which hours you are genuinely free, and it writes your study sessions in as events. The reading happens on your device. We do not send your event titles, guests or locations to our servers and we do not store your calendar. You can switch this off at any time in the app's settings or in your device's privacy settings.

Handwriting: when you write an answer by hand, the recognition that turns your writing into text runs on your own device, using the handwriting recognition built into it. Your ink is not uploaded to be read. What reaches us is the answer, exactly as if you had typed it.

Focus mode: the app may check whether your device is in a Focus or Do Not Disturb mode so it can adjust the study screen. We read this on your device and we do not store it.

Our legal bases for using your data

Data protection law says we must have a valid reason (a "legal basis") for using your personal data. We rely on the following.

Performing our contract with you: we need to use your account and study data to actually provide the Trayna service you have signed up for, such as your study plan and your progress tracking.

Consent: where consent is required (for example, optional study reminders through device notifications, and analytics and advertising cookies on our website), we rely on it and you can withdraw it at any time.

Legitimate interests: we use a small amount of data to keep the app secure and to improve the service. When we rely on this, we always balance it against your interests and rights, and we give extra weight to the interests of children. You can object to this (see your rights below).

Trayna is made for children, and how we protect you

Most people using Trayna are under 18, so we follow UK GDPR and the ICO's Age Appropriate Design Code (the "Children's Code"). The Children's Code asks us to put the best interests of children first when we design and run the app. Here is how we do that.

High-privacy by default: the app is set up to be private from the start. There is no public profile, no social feed, and nothing about you is shared with other users.

Data minimisation: we only ask for the information we genuinely need to help you study, and nothing more.

No ads and no tracking in the app: the app shows no adverts and uses no third-party analytics or advertising service, and we never sell or share your data for marketing. We do keep our own record of how the app is used and of anything that crashes, described above, and we use it only to keep the app working and to make it better for you. On our website, Google Analytics cookies are used only if you press Accept, Reject is always as easy as Accept, and adverts are never personalised to you.

Age: you must be at least 13 to use Trayna. When you enrol, you confirm that you are 13 or older. Under UK data protection law the digital age of consent is 13, and Trayna does not accept accounts from anyone under 13.

Parental rights: a parent or guardian can contact us at any time at info@trayna.co.uk to ask about their child's data, to access it, to correct it, or to have it deleted.

Where your data is stored

We store your core personal data in the United Kingdom. We use Google Firebase (for Authentication and our Cloud Firestore database) and Google Cloud Run, all running in Google's europe-west2 region, which is London, UK. This means your account and study data stays in the UK.

When you watch videos in the app, the video is streamed for us by Vimeo Inc., which is based in the United States. To stream a video to you, Vimeo may process your device's IP address and basic device information. This is an international transfer of a limited amount of data outside the UK, and it is covered by appropriate safeguards and Vimeo's terms. We do not send your name, study profile or progress data to Vimeo. If you use Sign in with Apple, a small amount of sign-in data is also processed by Apple outside the UK (see below).

Videos and 3D models are delivered to your device over Cloudflare's network. To send a file to you, Cloudflare processes your device's IP address. We do not send your name, study profile or progress data to Cloudflare.

Who we share your data with

We do not sell your data, and we do not share it for advertising. We only share data with the trusted service providers ("subprocessors") that help us run the app, and only so they can provide that service to us.

Google (Firebase Authentication and Cloud Firestore, and Cloud Run): hosts our app, stores your account and study data, and handles secure sign-in, in the UK (europe-west2). If you choose Sign in with Google, Google also acts as your sign-in provider.

Vimeo Inc. (US): streams the videos you watch, processing your IP address and device data to do so.

Apple: distributes the app through the App Store, handles all subscription payments, and provides the optional Sign in with Apple feature.

Cloudflare, Inc. (US): delivers our video and 3D model files to your device, processing your IP address to do so.

RevenueCat, Inc. (US): manages subscription entitlements for us, processing your user ID and subscription status (never your payment details) so the app knows which plan is active. This involves a limited transfer of data outside the UK under appropriate safeguards.

Google (Google Analytics), on our website only and only if you accept cookies: measures visits. Google may process this data outside the UK under appropriate safeguards. It never receives your Trayna account or study data.

We may also share data if the law requires us to, for example in response to a valid legal request.

If you use Sign in with Apple, Apple Inc. (US) processes your sign-in and, if you choose, a private relay email address on our behalf. This involves a limited transfer of sign-in data outside the UK under Apple's terms and safeguards.

How long we keep your data

We keep your personal data for as long as your account is active, so that your study plan and progress are there when you come back.

If you delete your account, your account record, your study data and your login are erased immediately. The usage, crash and question-report events described above are kept in a separate log, keyed to your account id rather than to your name; email us at info@trayna.co.uk and we will delete those as well. If you stop using Trayna without deleting your account, we delete inactive accounts and their data within 24 months. We do not keep your data longer than we need to.

Your rights and how to use them

You have rights over your personal data under UK GDPR. You can ask us to: give you a copy of your data (access); correct data that is wrong (rectification); delete your data (erasure); limit how we use it (restriction); move it to another service (portability); or object to certain uses, such as where we rely on legitimate interests.

The easiest way to delete everything is in the app: go to Settings and choose "Delete account". This erases all of your data and your login.

To use any of your other rights, or if you would like help, just email us at info@trayna.co.uk. We will not charge you and we will respond as quickly as we can. A parent or guardian can do this on behalf of a child.

If you are unhappy with how we have handled your data, you have the right to complain to the ICO, the UK's data protection regulator, at ico.org.uk. We would appreciate the chance to put things right first, so please consider contacting us before you do.

Changes to this policy

We may update this policy from time to time, for example if we add new features or change how the app works. When we make an important change, we will update the "last updated" date at the top and, where appropriate, let you know in the app.

Please check this page now and again so you always know how your data is looked after.

Governing law

This privacy policy, and any dispute relating to it, is governed by the laws of England & Wales.