Last updated: July 9, 2026
Calibrate is a personal decision journal for iPhone. It is built to be private by default: your decisions, confidence scores, and outcomes stay on your device.
None on our servers. Calibrate does not require an account and does not operate a backend that receives your journal. Decision titles, notes, confidence values, review dates, and outcome scores are stored in the app’s private on-device database (SwiftData / SQLite in your app sandbox).
There is no third-party analytics SDK, advertising SDK, or crash-reporting SDK in Calibrate v1.
Optional Calibrate Pro subscriptions are processed entirely by Apple through StoreKit / the App Store. Apple handles payment under Apple’s privacy policy. We never receive your payment card details.
Subscription status is verified on-device via StoreKit entitlements so Pro features can unlock without a Calibrate account.
If you allow notifications, Calibrate schedules local reminders for review dates on your device. Version 1 does not send remote push notifications from a Calibrate server.
Your journal data remains in Calibrate’s private on-device database until you delete it. You can delete an individual decision from its Decision actions menu. Deleting the app removes Calibrate’s on-device database, subject to any device backups you control through Apple.
Calibrate has no account system and does not keep a server copy of your journal, so there is no server-side account or journal data to delete or consent to revoke. If you have a privacy question or need help deleting local data, contact us at calibrate@provenmachine.com.
We do not collect diagnostics. Apple may collect system-level analytics if you have enabled Share With App Developers in iOS Settings; that process is controlled by Apple, not by us.
Calibrate is not directed at children under 13. We do not knowingly collect personal information from children.
If this policy changes, we will update the “Last updated” date on this page. Material changes will be reflected in the App Store listing or an in-app notice when appropriate.
Questions? Email calibrate@provenmachine.com.