ChessveraTerms of use
These terms cover your use of the Chessvera app, its optional online service and this website, all provided by Isaac Smith (Isaac Smith Labs, "we"). By using them you agree to these terms.
1. The software is free software
The Chessvera app is licensed to you under the GNU General Public License, version 3 (GPLv3). Its complete source code is available as described on the Source code page. Nothing in these terms limits the rights the GPLv3 gives you to run, study, share and modify the software. These terms only cover our online service, purchases and this website.
2. Accounts
- An account is optional. You are responsible for keeping your password safe. A lost password can be reset only if your account has a confirmed email address; otherwise we cannot recover it.
- Choose a username that is not offensive, does not impersonate anyone and does not include personal information you want to keep private. We may rename or remove accounts that break these rules.
- You can delete your account at any time (see Delete your account).
3. Fair play
In games against other people, the coach and engine are turned off, and you must not use any other engine, app or person to help you. We may reset ratings, remove results or close accounts that cheat or abuse the service. Games you play on Lichess through the app are also subject to Lichess's own terms and fair-play rules.
4. Acceptable use
Do not attack, overload, scrape or try to break into the online service; do not use it to harass other players; and do not use it for anything illegal. The source code is yours to use under the GPLv3, but our server and its data are not a public API.
5. Purchases
- Chessvera Pro is a one-time, non-consumable in-app purchase sold through the Apple App Store or Google Play. The store's terms apply to the payment, and refunds are handled by the store under its policy.
- Pro unlocks the Pro features in the app on devices using the same store account ("Restore Purchases"). It is not a subscription.
- We will keep improving the app, but features can change over time. We will not remove a purchased Pro feature without good reason, such as a legal or technical necessity.
6. Third-party services
The app can show and import public data from Lichess and Chess.com, and can connect to your Lichess account if you choose. Those services are run by others under their own terms; we are not affiliated with them and are not responsible for them. Chessvera includes the Stockfish chess engine and is not affiliated with or endorsed by the Stockfish project.
7. No warranty
The app and service are provided "as is" and "as available", without warranties of any kind, as also stated in the GPLv3. Chess analysis can be wrong. The online service may be interrupted, changed or discontinued.
8. Limitation of liability
To the extent the law allows, we are not liable for indirect or consequential losses, or for loss of data, ratings or game history. Nothing in these terms limits rights you have as a consumer that cannot legally be limited.
9. Changes and ending
We may update these terms; the new version will be posted here with a new date. You can stop using the service and delete your account at any time. We may suspend accounts that break these terms.
10. Governing law
[Owner to confirm: the country or state whose law governs these terms.]
11. Contact
Isaac Smith (Isaac Smith Labs): [email protected].