Terms of Service

Last updated: June 30, 2026

These terms govern your use of Chess Lab. By creating an account or using the service, you agree to them. If you don’t agree, please don’t use Chess Lab.

The service

Chess Lab is a study tool for finished games: it reviews games you’ve already played, explains your moves, and trains openings, tactics, and endgames.

Acceptable use

Chess Lab is for post-game analysis and training only. You agree not to use it for assistance during a live or ongoing game on any platform, or in any way that violates the fair-play rules of Chess.com, Lichess, or another chess service. You also agree not to abuse, disrupt, or attempt to gain unauthorized access to the service, and to only import games you have the right to use.

Your account

You’re responsible for keeping your login credentials secure and for activity under your account. You can delete your account at any time from your Account page.

Subscriptions & billing

Chess Lab is free to start. Chess Lab Pro is an optional paid subscription at $9.99/month or $79.99/year, billed through Stripe.

• Free trial. New subscribers get a 7-day free trial. A payment method is required to start it, but you are not charged during the trial. If you don’t cancel before the trial ends, your plan begins and the card is charged.
• Auto-renewal. Subscriptions renew automatically at the end of each billing period (monthly or yearly) at the then-current price, until you cancel.
• Cancel anytime. You can cancel from the billing portal (Manage billing on your Account page). Access continues until the end of the period you’ve already paid for.

Refunds

You can cancel at any time and won’t be charged again. Cancel before the trial ends and you pay nothing. After a paid period begins, payments are non-refundable, including for partial billing periods — you keep access through the end of the period you paid for. This does not affect any rights you have under applicable consumer law.

In-app currency & cosmetics

Chess Lab includes a virtual currency you earn through play, used for cosmetic items and course unlocks. It has no real-world cash value, cannot be purchased with real money, transferred, or redeemed for cash, and is forfeited if your account is closed.

Disclaimer & limitation of liability

Chess Lab is provided “as is” without warranties of any kind. Engine evaluations and lessons are aids to study, not guarantees of results. To the maximum extent permitted by law, we are not liable for indirect, incidental, or consequential damages, and our total liability is limited to the amount you paid us in the twelve months before the claim.

Changes

We may update these terms as the product evolves; material changes will be reflected by the “Last updated” date above. Continued use after a change means you accept the updated terms.

Contact

Questions about these terms? Reach us via Support.