Terms of Service

Last updated: April 13, 2026

Acceptance

By downloading or using ChessUnlock, you agree to these terms. If you do not agree, do not use the app.

License

ChessUnlock grants you a personal, non-exclusive, non-transferable license to use the application on your personal Mac computers. A single purchase covers all Macs you personally own and use.

Free trial

ChessUnlock offers a 7-day free trial. After the trial period, a valid license key is required to continue using the app.

Refunds

If you are not satisfied with ChessUnlock, contact us within 30 days of purchase for a full refund. No questions asked.

Puzzle content

Chess puzzles in ChessUnlock are sourced from the Lichess open puzzle database, which is available under the Creative Commons CC0 license.

Restrictions

You may not:

• Redistribute, resell, or sublicense ChessUnlock
• Reverse-engineer, decompile, or disassemble the application
• Share your license key with others

Disclaimer

ChessUnlock is provided "as is" without warranties of any kind, express or implied. We do not guarantee uninterrupted or error-free operation.

Limitation of liability

To the maximum extent permitted by law, ChessUnlock's liability is limited to the amount you paid for the software.

Changes

We may update these terms from time to time. Continued use of the app constitutes acceptance of updated terms.

Contact

Questions? Reach us at [email protected].