Privacy Policy
Last updated: June 12, 2026
No account needed
TsumeDojo does not require sign-up and does not collect your name, email address, or any personal profile.
Progress stored on your device
Your solving progress (solved counts and streaks) and a randomly generated anonymous ID are stored in your browser’s local storage, on your device. Clearing your browser data removes them. They are never tied to a real-world identity.
Solve statistics
When you attempt or solve a problem, the result — which problem, correct or not, the time taken, and whether you used a hint — is sent to our server along with the anonymous ID. We use this only in aggregate, to calibrate how hard each problem is.
Analytics
We may use Google Analytics to understand overall traffic. It sets its own cookies; you can block them through your browser settings or an extension. Analytics loads only when it is configured for the site.
Advertising and affiliate links
The site is currently ad-free. If we add advertising or affiliate links in the future, we will update this policy to describe what they collect.
Contact
For questions about this policy or your data, please contact the site operator. A public contact address will be added here before any advertising is introduced.