Private period tracker that works fully offline
Period Tracker & Calendar is a free menstrual cycle tracker for Android. Mark your period on a calendar, see your predicted ovulation and fertile window, log symptoms and mood, and export a report for your doctor - without an account, without a sign-up, and without an internet connection.
Your diary is stored in a local database on your phone.
What it does
Period and cycle calendar. Mark your period start and end dates on a clear month calendar. See the day of your current cycle, your last period, and the predicted date of your next one at a glance.
Ovulation and fertile window. Predictions are calculated from your own cycle history, then used to estimate your ovulation day and high-fertility window. Useful whether you are trying to conceive or simply want to understand your body's rhythm.
Symptom, mood and flow logging. Record daily symptoms, mood, flow intensity and free-form notes. Customize the fields you track to match your routine, and spot patterns across cycles.
Cycle statistics and history. Average cycle length, average period length, a cycle-length chart for the last 6 months, and a scrollable period history.
Reminders, only if you want them. Set a reminder a chosen number of days before your period is expected, at a time you choose. Notifications are off by default and the app only asks for permission when you turn them on.
Export a report for your doctor. Generate a PDF report or a CSV file of your period history from the Home screen. Keep the CSV as a backup, or send the PDF to a doctor. A backup CSV can be imported back into the app at any time.
Why people choose this one
- Works offline - no internet connection needed
- No account, no sign-up, no email address required
- Your diary is stored in a local database on your device
- Lightweight and battery-friendly
- Simple calendar interface, no clutter
- 10 languages included: English, Vietnamese, Spanish, French, Arabic, Portuguese, Marathi, Indonesian, Khmer and Simplified Chinese
Getting started
- Open the app and tap the + button to add your most recent period, with its start and end dates.
- Keep logging - after two or three cycles the predictions become noticeably more accurate.
- Open Settings to choose your language, set reminder timing, or export a backup.
Frequently asked questions
How do I add a period? Tap the + button in the top right, or open the Data tab, then choose your period start and end dates.
How does the prediction work? The app calculates your average cycle length from your past periods, then estimates your next period and your ovulation window.
What is the ovulation day? Ovulation is the most fertile part of the cycle. The app estimates this day from your own cycle history.
Where do I export my data? On the Home screen, use the export buttons for a PDF report or a CSV file.
How do I back up my data? In Settings, use the CSV export action to create a backup file. To restore it, choose Import data and select that file.
Is my data safe? Your diary - dates, symptoms and notes - is stored in a local database on your device. There is no account and no sign-up. See our Privacy Policy.
About the predictions
Period Tracker & Calendar is a tracking tool, not a medical device. Its predictions are estimates calculated from the history you log yourself. It is not a substitute for medical advice, and it is not a method of contraception.
Support
Questions, bug reports or feature suggestions: admin@hamatim.com. If the app is useful to you, a review on Google Play helps a lot.
