BlunderloopSupport
Blunderloop finds the mistakes in your own Lichess and Chess.com games and lets you practise them with spaced repetition.
Questions, suggestions or a problem? Email us in English or German:
For a technical issue, please include your Blunderloop version (Settings), iPhone model, iOS version and a short description of what happened. Never send passwords or your Lichess token.
Frequently asked questions
Do I need an account?
No. Enter your Lichess or Chess.com username and Blunderloop loads your public games directly from lichess.org or api.chess.com. There is no Blunderloop account and no server of ours that stores your data.
Where is my data stored?
Games, positions, progress and settings stay on your device. Analysis runs on your iPhone with the built-in Blunderloop Engine. An optional Lichess token is kept only in your device’s keychain. Details: Privacy Policy.
How does the full version work?
Blunderloop is free to download and try for 30 days. After that, a one-time purchase unlocks new positions; reviewing the positions you already have stays free. If you reinstall or use a new device, open Settings → Full version → Restore purchases.
How do I delete my data?
Open Settings → Delete all data …, or delete the app. Nothing is kept anywhere else.
Report a security issue
If you have found a possible security vulnerability in Blunderloop, please email contact@jandeboer.de with the affected version and steps to reproduce.