Terms of Service
These terms cover the TChess Android app (app.tchess) and the TChess website and web app at tchess.app. By using TChess you agree to them.
1. What TChess is
TChess is a chess training app: puzzles, lessons, opponents to play against, and analysis. There is no advertising, and there never will be.
2. Free, and TChess Pro
Almost all of TChess is free and stays free: the 60,000 puzzles, the engine, every bot, Puzzle Rush, the lessons, the endgame drills and game review. There are no limits on them and no account is needed to use them.
TChess Pro is a paid tier covering the opening tools — the repertoire trainer, the opening explorer, the opening library, opening practice and the AI coach. It is sold as a monthly or annual subscription, or as a one-off lifetime purchase.
Nothing that was free has been made paid, and nothing that is free today will be. Pro covers features that did not exist in the free app.
Where you buy decides who bills you. A purchase made in the Android app is billed by Google Play, and Google’s terms and refund policy apply. A purchase made on tchess.app is billed by Paddle.com, which acts as the merchant of record — Paddle appears on your statement, handles tax, and processes refunds. See the Refund Policy.
3. Your account is optional
TChess works fully without an account. Everything — the puzzles, the engine, your rating and your progress — runs on your device.
Signing in copies your rating, streak, experience and per-theme progress to our server so the same figures appear on your other devices. It is not required to use TChess, and it is not what unlocks TChess Pro — but a subscription follows your account, so signing in is how Pro reaches your other devices.
You are responsible for the security of the email account you sign in with. Anyone with access to that inbox can sign in as you.
4. Acceptable use
Do not:
- attempt to break, overload or gain unauthorised access to the service or to other people’s accounts;
- use automated means to manipulate ratings, streaks or leaderboards;
- redistribute the app modified, or present it as your own.
We may suspend an account that does any of these. Because the app works signed out, a suspension does not stop you using TChess on your own device.
5. Your content and your data
You keep everything you create. We claim no rights over your games, your analysis or your progress. What we store and why is set out in the Privacy Policy, which forms part of these terms.
You can delete everything held on our servers at any time — see here.
6. Third-party material
- Puzzles come from the Lichess open database, released under CC0 (public domain).
- Piece artwork is Colin M.L. Burnett’s set, CC BY-SA 3.0.
Their licences govern their material and are not superseded by these terms.
7. Availability
TChess is provided as-is. We do not promise it will be available without interruption, that sync will always succeed, or that it will be free of defects. The app is designed so that none of that stops you playing: everything works offline, and a failed sync is retried rather than surfaced as an error.
8. No warranty
To the fullest extent permitted by law, TChess is provided without warranties of any kind, express or implied, including fitness for a particular purpose and non-infringement.
9. Limitation of liability
To the fullest extent permitted by law, we are not liable for any indirect or consequential loss arising from your use of TChess, including loss of data or of progress. TChess is a free chess app; please do not rely on it as the only copy of anything you care about. Nothing here limits liability that cannot lawfully be limited.
10. Ending it
You can stop using TChess at any time. Uninstalling removes everything stored on your device. To delete data held on our servers, use the deletion form.
11. Changes to these terms
We may update these terms. The date above changes when we do, and material changes are noted in the app under Settings → About → What’s new. Continuing to use TChess after a change means you accept it.
12. Law
These terms are governed by the laws of Pakistan, without regard to conflict of law rules.