Privacy Policy

Last updated: 7 October 2026

The short version

• You can take the test without giving us anything.
• A profile photo is optional. If you add one, it is public.
• If you create an account we store your email address, a username, your scores and, only if you choose to add them, your country and US state.
• We do not ask for your date of birth, age, gender or precise location.
• We do not sell personal data.
• Your email address is never shown to other players.

If you play without an account

Your test runs in your browser and the result is not saved by us. If you finish a test and have not signed in, the result is held in your own browser’s storage so that it can be saved if you create an account within the hour. After that it is ignored. It never leaves your device unless you sign up.

What we store when you have an account

Your sign-in details

Your email address, used to send you a sign-in code and to identify your account. We do not use passwords. A sign-in token is kept in your browser’s storage so you stay signed in.

Your profile

• A username you choose.
• Your country and US state, only if you add them. They are optional, and you can change or clear them on your profile at any time.
• A profile photo, only if you add one. It is cropped to a square and shrunk in your browser before it is uploaded, so we store a small image and not your original photo. You can change or remove it at any time.
• The date your profile was created.

Your test results

For each test you save: words per minute, accuracy, number of errors, counts of characters and keystrokes, the test length and the time it was completed. We do not store the text you typed.

A general device type for each result

Thumbster is a phone typing competition, so each saved result is marked Official or Practice depending on the kind of device it was typed on. To decide that, your browser sends a few general signals with the result: whether the browser describes itself as mobile, whether the device has a touchscreen, whether the main pointer is a finger or a mouse, and the approximate size of the screen. Our server compares these with the browser information that comes with every web request.

What we keep is the outcome and a coarse summary: phone, tablet, desktop or unknown; the operating system family; whether the device reported a touchscreen and a finger pointer; and whether the screen was phone-sized. We do not keep your browser’s full identifying string or your exact screen size for this purpose, and we do not build a fingerprint of your device. More about official scores.

What we do not collect

• Date of birth or age.
• Gender.
• Precise location. We never ask for your device’s location.
• Your contacts, photos or anything else on your phone.
• Payment details. Thumbster is free and takes no payments.

What other people can see

• Leaderboards show your username and profile photo, your best official score with its accuracy and the time it was set, and your country and US state if you added them.
• Challenge links you create show your username and profile photo, the score to beat and its accuracy to anyone who has the link.
• Your email address, your practice scores and your full history are visible only to you.

How we use this information

• To sign you in and keep your account secure.
• To save your scores and show your personal best.
• To run leaderboards and challenges.
• To keep rankings fair, including removing scores that were not genuinely typed by thumb on a phone.
• To reply when you contact us.

We do not sell personal data, and we do not use it for advertising. Thumbster does not currently run adverts or third-party analytics trackers. If that changes, this policy will be updated first.

Companies that help us run the service

We use other companies to host the website and database, to handle sign-in and to deliver sign-in emails. They process information on our behalf so the service can work, and like any web service they may keep routine technical logs, such as IP addresses, for security and reliability.

How long we keep it

We keep your account and scores until you ask us to delete them. When an account is deleted, its profile, scores and challenge links are removed with it.

Your choices

• Play without an account.
• Leave your country and state blank, or clear them later.
• Ask for a copy of your information, a correction, or deletion of your account by emailing hello@thumbster.ai from the address you sign in with.

Depending on where you live, you may have additional rights under local law. Contact us and we will do our best to help.

Children

Thumbster is a general-audience site and is not directed at young children. We do not knowingly collect personal information from children under 13. If you believe a child has created an account, please contact us and we will remove it.

Changes to this policy

If we change what we collect or how we use it, we will update this page and the date at the top.

Contact

Questions about privacy? Email hello@thumbster.ai.