Osmi: Period & Cycle Tracker

Osmi is a calm, simple period tracker. One question a day, answered in a tap — that's the whole job.

YOUR CYCLE, AT A GLANCE Open the app and see your cycle day, your phase, and the one thing Osmi wants to know today. Tap, done.

A CALENDAR THAT WORKS LIKE YOU THINK Tap any day to log a period, fix a mistake, or add how you felt. Add past periods so your history is complete from day one.

HONEST ESTIMATES After two completed cycles, Osmi shows your expected next period and an estimated ovulation window — always labeled as estimates, because dates alone can't confirm ovulation. No false certainty, ever.

TEN-SECOND CHECK-INS Energy, body, mood — saved as you tap. Over time, Osmi maps how you feel to where you are in your cycle.

APPLE HEALTH, READ-ONLY Already tracking in another app? Import your period history from Apple Health in one tap. Osmi only reads — it never writes to Health unless you ask.

PRIVATE BY DESIGN No account. No sign-up. Every log stays on your device. We can't see your data, and neither can anyone else.

Osmi is for education and pattern-spotting — it does not provide medical advice, diagnosis, or contraception guidance.