Terms of use

Free and recreational

Games and tests are provided as-is for recreational practice. Measurements are approximate, depend on your browser and equipment, and must not be used for clinical, employment or safety-critical determinations.

Use responsibly

Do not interfere with the site or attempt to access other visitors’ information. You are responsible for anything you choose to export or share.

Changes

Tools and pages can change as the website develops. We aim to keep useful existing addresses working through suitable redirects.