Privacy Policy
Last updated October 9, 2026
The short version: almost everything stays on your phone. We don’t have accounts, we don’t show ads, we don’t track you across other apps and we never sell your data. The only things that leave your phone are explained below, and none of them is your email, phone number or payment details.
Who we are
Brainstake is made by Pebblewick Ltd, a company registered in England and Wales (“we”, “us”). We are the data controller for the information described here. You can reach us at support@getbrainstake.com.
What stays on your phone
Your game results, scores, levels, Brain Score, streaks, settings, reminder time, the answers you give in the intro and the first name you choose to give us are stored on your phone. We can’t see them. Deleting the app deletes them.
What leaves your phone, and why
- Your coach’s voice. When the coach’s voice is on, your phone sends the words of the coach’s line to our voice service so it can be spoken out loud. Those words can include the first name you gave us, because your coach says it. Our voice service uses ElevenLabs to turn the words into audio. The audio is stored on our service and reused for anyone who needs the same line, so it only has to be made once. Turn the voice off on the Me tab and nothing is sent.
- How you compare. After the test in the intro, your phone sends your age and your three test scores to our service so we can show how you compare with other players. These are sent with a random ID made on your phone. It isn’t linked to your name, email or Apple Account.
- A random install ID. Requests to our voice service carry the same random ID, so we can keep each phone within a fair daily limit.
- Subscriptions. Payments are handled entirely by Apple. We never see your card or payment details. The app checks with Apple whether your subscription is active.
Reminders and nudges are scheduled on your phone. We don’t send them from a server.
Who helps us
- Cloudflare runs our voice service and this website.
- ElevenLabs turns the coach’s words into audio.
- Apple distributes the app and handles payments, under its own privacy policy.
Some of these companies are based outside the UK. Where your data goes abroad, it is protected by the safeguards UK data protection law requires.
Why we’re allowed to use it
We use this information to run the features you use (the voice and the comparison), which is our legitimate interest and part of providing the app to you. You can switch the voice off at any time.
How long we keep it
Voice audio is kept so the same line can be reused. Comparison scores are kept to work out averages. Neither is linked to who you are. You can ask us to delete anything tied to your install ID at any time.
Your rights
You can ask us for a copy of your data, ask us to correct or delete it, or object to how we use it. Email support@getbrainstake.com. If you’re unhappy with how we’ve handled your data, you can complain to the Information Commissioner’s Office at ico.org.uk.
Children
Brainstake isn’t meant for children under 13, and Savage mode uses strong language. We don’t knowingly collect data from children.
Changes
If we change how we use data, we’ll update this page and the date at the top. Big changes will also be shown in the app.