User Support
Need help with Period or want to share a suggestion? Contact the developer:
What to include
- Your device model, iOS version, and Period app version.
- For Watch issues, your Watch model and watchOS version.
- What you expected, what happened, and the steps that led to the problem.
Do not send passwords, payment details, complete backups, or private period history. A description without personal health details is usually enough to start.
Recording and predictions
Use the app to record actual period start and end dates, correct previous entries, and review history and daily observations. Calendar predictions are estimates derived from saved records and settings; they do not create actual period entries. They must not be used for contraception or medical diagnosis.
Apple Watch sync
Pair the Watch with your iPhone, install Period on both devices, and open the iPhone app for the first sync. The iPhone is the main data source. After that first sync, supported Watch entries can be saved offline and sent when the connection returns. In My, “Apple Watch sync” shows connection information and requests an update. Sync requires Pro access.
If records differ, keep both apps installed, check their connection and membership status, and contact support before clearing data or reinstalling. Clearing data is not a sync troubleshooting step.
Apple Health
In the Apple Health settings page inside Period, you can enable writing actual period records or choose to preview and import eligible menstrual flow records. These features require permission and Pro access. Write sync does not export predictions, mood, symptoms, or notes. Disabling it leaves previously written Health records in place; manage those copies in Apple Health.
Reminders, privacy, and backups
Check the app's reminder settings and the system notification permission if reminders do not appear. Review lock-screen notification previews if you share access to your device. You can also enable app lock and control whether the widget shows a reference date.
Before replacing your phone or removing the app, save a backup if you need to keep your records. Backup and restore are Pro features. Importing a backup replaces the app's record document; review the confirmation and keep your original file. Protect exported files separately.
Purchases and subscriptions
Use “Restore purchases” on the membership page with the Apple Account used for the original purchase. Use the subscription management entry or Apple's system subscription settings to manage renewal. Deleting records or uninstalling Period does not cancel a subscription.
About Period
Period is a personal recording tool for iPhone and Apple Watch. Its predictions and reports are for reference only, not contraception, diagnosis, or treatment. For medical concerns, seek advice from a qualified healthcare professional.