Period Calendar Period Tracker: Track Cycles and Ovulation

Period Calendar Period Tracker is a health and fitness app by Simple Design Ltd. that helps you log menstrual cycles and estimate upcoming periods, ovulation and fertile days. If you have ever tried to remember when your last period started, or wondered which days matter most when you are trying to conceive or avoid pregnancy, this app is built for exactly that problem. You enter simple details about your cycle, and the app uses them to build a calendar view of predictions. It has been available since March 2012 and has accumulated a large user base over the years, with a rating of 4.89 from more than 4.89 million ratings and more than 100 million installs. The current version in the data is 1.77.355.GP, dated 11 October 2026, and the app was last updated on 10 September 2026. It is free to download, supported by ads, and offers optional in-app purchases. No account creation or real-name registration is required, so you can start using it anonymously.

Key features

• Period, cycle and ovulation prediction that adapts to the dates you log
• Fertility tracking that estimates your chance of conceiving on a given day
• Pill reminder supporting pills, rings, patches and injections, with customizable and discreet notification text
• Symptom and mood logging that includes intimacy, cervical mucus, cervical firmness, cervical opening, weight, temperature and BMI entries
• Body temperature chart to help narrow down your ovulation date
• Backup and restore of your data to your phone or email, plus backup through your Google account
• Multi-account support with security protections and a searchable timeline of your notes
• Wear OS complications and tiles for period and ovulation predictions, water drinking reminders and pill reminders

How to install

1. Tap the download button on this page to get the APK file.
2. When Android asks for permission, allow your browser or file manager to install apps by enabling the "Install unknown apps" setting for that app.
3. Open the downloaded APK file from your notifications or your file manager.
4. Tap Install and wait while the 59 MB file is copied and set up.
5. Open the app once installation finishes. It requires Android 6.0 or newer.

Fresh Updates

The 2026-09-10 update brings a major upgrade to Pregnancy Mode. You can now follow your baby's growth week by week and see what to expect for both you and your baby. The pregnancy tracker has also been made smoother and more accurate.

This app suits anyone who wants a simple, private way to keep a record of their menstrual cycle, whether their periods are regular or irregular. It is useful for people trying to conceive, people using it alongside birth control, and anyone who wants reminders for contraceptive pills or a place to note symptoms and moods. Because it works anonymously and supports multiple accounts, it can also fit households where more than one person tracks a cycle.

Log your period start and end dates as accurately as you can for the first couple of months, since the predictions improve as more data builds up. If you use contraceptive pills, rings, patches or injections, set up the reminder early and adjust the notification text so it stays discreet. You can also add the app's tiles to a Wear OS device for quick access to predictions and reminders.

Period Calendar Period Tracker is a mature, widely used option for cycle logging and prediction, and its free tier covers the core tracking most beginners need. Keep in mind that it shows ads, offers in-app purchases and asks for a few permissions, so decide whether that trade-off works for you.