Last Updated: October 9, 2026
Pain Diary is developed by WittyApps. It is designed as a local-first diary for sensitive health information.
Pain entries, body areas, triggers, medication notes, custom trackers and settings are stored locally on your device.
Subscription status and purchase history are handled by RevenueCat and the platform app store so Pro features can be unlocked and purchases restored. RevenueCat assigns an anonymous customer identifier to the installation; purchase history is associated with that identifier. You do not create a Pain Diary account.
Crash reports may be sent to Sentry if enabled in release builds.
Product analytics may be sent to Amplitude if enabled in the release build. These events contain
feature and action names, app/platform/version context, locale, and subscription state; diary text, pain scores, medication details, and report contents are not sent. The analytics SDK uses a device identifier and receives connection information such as an IP address. This may be used to estimate country or region. Device GPS location is not requested for analytics. We do not use analytics for advertising or sell these events.
We do not operate an account system and do not upload your diary entries to our servers. We do not sell data and do not use advertising.
Your diary data remains on your device until you delete entries, clear app data, or uninstall the app. A lapsed or cancelled subscription does not remove your entries. PDF files you generate are local files and remain accessible unless you delete them.
The app includes optional app lock / biometric unlock. Sensitive app-switcher screenshots are covered while the app is locked. Device-level security remains important; use a device passcode and backups appropriate for your needs.
Pain Diary is a self-tracking tool, not medical advice, diagnosis or treatment.