Period Diary: Cycle Tracker

YOUR PRIVATE DATA NEVER LEAVES YOUR PHONE.

Period Diary helps you track your menstrual cycle with privacy at the center.

No account. No sign-up. No personal data collection.
Your cycle data stays on your phone.

Track what matters:

Period start and end dates
Cycle length and trends
Ovulation day and fertile window estimates
Daily symptoms, mood, flow, and notes
Calendar view for a clear cycle timeline
Reminders for upcoming period and ovulation days
Built for clarity and control:

Fast daily logging
Easy-to-read calendar and cycle insights
Helpful predictions based on your logged history
Simple experience without unnecessary complexity
Privacy-first by design:

No account needed
No personal profile required
No exporting your health data to external servers
Your entries remain on your device
Whether you want a simple period tracker, an ovulation calendar, or a cycle log with symptom tracking, Period Diary gives you useful insights while respecting your privacy.