Terms of use

Last changed 2026-10-13. Draft, to be reviewed before launch.

1. The app. useful.fitness is run by Jan Vesely and offered as it is, for experienced athletes.
2. Invite only. An account needs an invite from a member. One account per person; keep your login to yourself. You're responsible for the people you invite.
3. At your own risk. You train at your own risk, as set out in the disclaimer you accept before using the app.
4. Fair use. Don't try to get into other accounts or parts of the app that aren't yours, don't overload it, and don't copy its contents in bulk.
5. Your data. What you save stays yours; it's stored only to provide the app (see the privacy notice). You can download or delete it at any time.
6. No guarantees. The app may change, be unavailable or stop. Where possible you'll be told in advance, so you can download your data.
7. Closing accounts. You can delete your account at any time. An account that breaks these terms can be disabled or closed.
8. Liability. As far as the law allows, the operator accepts no liability for damage resulting from using the app.
9. Law. Dutch law applies; disputes go to the competent court in the Netherlands.
10. Changes. A new version of these terms is announced in the app.

Questions: the contact form.