Terms of use

Last updated: 28 October 2026

Knightly is an independent chess training product operated by Domenico Di Donna. Contact support@trainchess.app.

Training and your content

Analysis can be imperfect. Training results and puzzle ratings are learning indicators, not official player ratings or guarantees of improvement. Only import games and positions you are entitled to use. Your imports remain local.

Free use and store subscriptions

The browser trainer is free and has no checkout or advertising. Native builds may show advertisements between completed sessions. Pro removes those breaks. Monthly/annual prices and renewal terms are shown by the app store when available; manage cancellation and refunds through that store. Restoring purchases does not create a new charge.

Local storage

There is no account backup or cloud sync. Clearing browser/app data or resetting progress can remove saved training records. These terms do not limit rights that cannot be excluded under applicable law.