Logged-cycle estimate, check-ins, and privacy

How HerPhase Works

HerPhase uses your last period start date and usual cycle length to display a logged-cycle timing estimate. Optional check-ins remain separate user-entered observations.

Cycle Estimate

The app calculates the number of days since your last period start, wraps that number across your selected cycle length, and maps the day into estimated Menstrual, Follicular, Mid-cycle, or Luteal phases.

Check-In Score

The score uses only the sleep quality, stress, and energy values you log for that day. A day without a check-in displays a neutral value. The estimate does not affect the score.

Insights

Insights show counts and averages from recent check-ins. They do not determine causes or forecast future experiences.

Privacy

In the free-first version, HerPhase stores entries locally, has no account or app-managed cloud sync, and uses no analytics or tracking SDKs. Device backups and transfers follow your operating-system settings.