OSDev Apps
Also listed as Period Tracker: Cycle Calendar on the Play Store
Period Tracker
Private period tracker with predictions, reminders, and a cycle calendar.
A fast, calm way to keep track of your cycle. Log a period in one tap, see when your next one is expected, and get on with your day — no clutter and no account required.
Everything you need, nothing you don't
Know what's coming
See your next period at a glance, based on a rolling average of your own logged cycles.
Log in seconds
Tap once for today, or pick a past date. Flow intensity and notes are optional.
A calendar that makes sense
Logged days and predicted days are shown differently so you always know what's confirmed.
Reminders, on your terms
A local reminder a day or more before your period — a quiet nudge from your own phone.
Home screen widget
Check your status without opening the app.
Your data stays yours
Stored locally. No account. Export and import a backup file anytime.
