How privacy works
I do not require an account, and I do not run a health-data server that receives your period or cycle records. Here is the complete explanation, without pretending local storage is magic.
The details
I store health and cycle records locally as app data on your device. I do not upload or sync them to a Petal Chan health-data server. The records are not separately encrypted at rest by Petal Chan, so your device passcode and operating-system protections matter.
Petal Chan exports an ordinary plaintext CSV file. On phones, the app creates it in the app cache and opens the system share sheet. I do not encrypt that exported file or explicitly delete the cached copy afterward. Once you send a copy elsewhere, its privacy depends on that destination.
Apple or Google handles the payment. I use RevenueCat for offerings, purchase handling, entitlement checks, validation, and restores. RevenueCat receives the purchase information needed for those jobs, not your menstrual-cycle history.
PIN lock helps stop someone from casually opening the app. Chan+ can add biometric unlock and an app-switcher privacy screen. I use secure device storage for PIN verification and attempt state, not as the database for your health records.
Android Auto Backup is disabled. On iOS, I do not currently add an explicit iCloud-backup exclusion for the health-data store, so backup behavior depends on your Apple device and account settings.
Production builds do not send Petal Chan analytics events, and the app contains no advertising network. The formal Privacy Policy explains the development-tooling distinction.
No. I do not operate a health-data backend that receives your period or cycle records.
Yes. You can reset app data from Petal Chan's settings. Copies you exported or saved elsewhere need to be deleted from those destinations separately.
No. Your operating system handles Face ID, Touch ID, fingerprint, or device face unlock. Petal Chan receives only the result needed to unlock the app.
For the formal details, read the Privacy Policy.
