Last updated August 2026. Operating entity: pending.
This is how to reach Sinter. There is no separate helpdesk. Email is the address the store listings use, and it is the address in the app.
Write to support@sinter.fit. Use the address you signed up with if the question is about your account, a subscription, or deleting your data.
Web subscriptions are managed in the app under You, then your profile, then Manage subscription. That opens the billing portal, where you can update a card, switch monthly and annual, or cancel. App Store and Play subscriptions are cancelled in that store’s subscription settings, not inside Sinter.
Export is always available from the same account sheet, including after a subscription ends. To delete the account, use the in-app Delete account control, or follow .
We do not diagnose injuries, rewrite a plan as a clinician, or give medical advice. Sinter is wellness and fitness information. If something in the app is broken, say what you tapped and what you expected.
Questions: support@sinter.fit