A real person reads every message: hello@menoshift.app. Include your app version (More → bottom of the screen) and your phone model.
Open the Health app → Sharing → Apps → MenoShift (iOS) or Health Connect → App permissions (Android) and allow sleep, heart rate variability, resting heart rate, menstruation and wrist/skin temperature. Then in MenoShift open More → Apple Health / Health Connect. Wrist temperature needs an Apple Watch worn during sleep (Series 8 / Ultra or later) or a device that writes skin temperature to Health Connect.
No. Cycle variation of a week or more and gaps over 60 days are the transition itself. MenoShift shows them as data and does not predict "next period".
More → Your data → Export backup, send the file to yourself, then Import backup on the new phone. Nothing is stored on our side.
Manage subscriptions in your App Store or Google Play account settings. To restore a purchase on a new phone: More → MenoShift Pro → Restore purchases.
Bleeding after twelve months without a period, very heavy bleeding or periods longer than seven days, bleeding between periods or after sex, symptoms that stop you living normally, or symptoms before age 40 — these need a clinician, not an app.