Privacy Policy & Terms of Service for Chess Reviews

Thank you for using Chess Reviews ("the App"), a chess app that reviews your games, finds your mistakes and trains you on them. This document outlines our commitment to your privacy and the terms you agree to when using the App.

Privacy Policy

1. Your Games and Analysis Stay on Your Device. Imported games, the mistakes found in them, your training progress and your settings are stored only on your device. The engine (Stockfish) runs on your device, so no position or game is sent anywhere to be analysed.
2. Importing Games Uses the Internet. If you choose to import games, the App sends the username you enter to Chess.com or Lichess, the sites you picked, and downloads that user's public games. Their privacy policies apply to those requests. You can also open a game from a PGN file or pasted text without using the internet.
3. No Account. The App has no sign-in and no account with us. We do not receive your username, your games or any other data.
4. Puzzles. The practice puzzles are bundled inside the App from the Lichess open puzzle database (CC0). They work offline.
5. No Ads or Trackers. The App is free of advertisements and third-party trackers. We do not run analytics or crash reporting.
6. Optional One-Time Pro Purchase. The App offers an optional one-time Pro purchase that removes the daily limit on game reviews. Purchases are processed entirely by Google Play, which tells the App whether Pro is owned. We never see or store your payment details, and we do not receive your name or email from the purchase.
7. Data Retention. Everything lives on your device until you clear the App's data or uninstall it. We hold nothing, so there is nothing for us to delete.

Terms of Service

1. Your Content. Games you import remain subject to the terms of the site they came from. Use the App only with games you may access, and with usernames you are entitled to look up.
2. Analysis Is a Guide. Engine evaluations, accuracy figures and move grades are estimates and can be wrong. The App is a learning aid, not a guarantee of how you will play.
3. In-App Purchase. Free use includes 20 game reviews a day; games you have already reviewed stay open. The optional one-time Pro purchase removes that daily limit. It is processed by Google Play and is subject to Google Play's refund policy. If a purchase is refunded or revoked, the daily limit returns. Everything else in the App is free.
4. Third-Party Services and Software. The App is not affiliated with or endorsed by Chess.com or Lichess. It uses the Stockfish engine (GPL) and the Lichess puzzle database (CC0). Its source code is at github.com/naveeens/chess_reviews.
5. Open Source. Chess Reviews is free software under the GNU General Public License v3 or later. Its source code is at github.com/naveeens/chess_reviews. Its move grading and mistake puzzles are ported from Rookahead by bijoyv9 and contributors (GPL-3.0-or-later), with changes for Android.
6. Back Up Your Data. Your data is stored only on your device, and we cannot recover it if you lose the device or uninstall the App. Imported games can be fetched again from the source site.
7. Disclaimer of Warranty. The App is provided "as is," without warranties of any kind. We do not guarantee that it will be error-free or meet all your needs.
8. Limitation of Liability. In no event shall the developer be liable for any damages arising from the use of or inability to use the App.
9. Changes to These Terms. We may update this policy. Continued use of the App after any changes constitutes your acceptance of the new terms.