Terms of Service

Last updated: April 2026

1. Acceptance of Terms

By using Chess Calculator, you agree to these terms. If you disagree, please do not use the service.

2. Service Description

Chess Calculator provides chess analysis tools, AI coaching, ELO test, PGN analysis, Play vs AI, Human Mode, Screenshot Scanner, Chrome Extension, and Desktop App — powered by Stockfish 18. The service is provided as-is.

3. Usage

Chess Calculator provides chess analysis, AI coaching, Human Mode, Screenshot Scanner, and a Chrome Extension. How you use these tools is your responsibility. We are not responsible for any actions taken by third-party platforms.

4. Accounts

You are responsible for maintaining the security of your account. One account per person. Sharing accounts is not permitted.

5. Payments

All Premium plans are billed via Cryptomus (cryptocurrency) as one-time payments — there is no automatic renewal or recurring billing. When your plan expires, you can buy again to continue using Premium features. Desktop app and Chrome Extension are included with every Premium plan.

6. Refunds

See our Refund Policy for details on cancellations and refunds.

7. Limitation of Liability

Chess Calculator is provided as-is without warranties. We are not liable for any damages arising from use of the service.