Privacy Policy

Last updated: October 6, 2026

Data stored on your device

Photos you take or select, measurement results, and the names, joint labels and notes you enter are stored only on your device. We do not send them to our servers. The data export/import feature saves to, and reads from, a location you choose.

Information the app collects

To improve the app and fix bugs, we use the following services:

• Firebase Analytics (Google): usage data such as screens viewed and features used
• Firebase Crashlytics (Google): device information (such as model and OS version) and error logs when the app crashes
• RevenueCat: managing the status of premium (subscription) purchases. Payments are processed by Apple; we never receive your card details

These services handle information under their own providers' privacy policies. We do not use this information to identify you, sell it to third parties, or serve advertising.

Children's privacy

We do not knowingly collect personal information from children.

Changes

If this policy changes, we will announce it on this page.