Period Calendar is for people who want to log menstrual cycles, plan around fertile days, or set a pill reminder on their phone. It comes from Simple Design Ltd., first released on March 15, 2012, and last updated on October 16, 2026. Google Play is where you install it.
Who gets the most out of a cycle tracker with no sign-up
The app covers two groups: people trying to conceive and people using birth control. Its description also says it works for regular and irregular cycles, and mentions a simpler record-keeping mode for teens.
No account creation or real-name registration is needed, and every feature can be used anonymously. For anyone wary of handing personal health details to a service, that is the main draw. Google Play lists it as suitable for Everyone, and it is tagged under health and fitness within the calendar apps category.
Predictions, ovulation tools and the daily log in practice
The core function is prediction of menstruation, cycles and ovulation. The app includes a period calculator, a fertility calculator and an ovulation tracker, and it can estimate daily odds of conceiving.
The log goes beyond dates. You can record flow, cervical mucus, weight, BMI, sexual activity, symptoms and moods, and a basal body temperature chart helps you work out an ovulation date. Ovulation test results can also feed into the predicted date. Notes are searchable through a timeline.
Reminders cover periods, fertility and ovulation, plus contraceptive pills, rings, patches and injections. You can change the notification text so it looks discreet on a lock screen. Wear OS complications and tiles add period, ovulation, water and pill reminders on a watch.
Backups, multiple profiles and what the free tier costs
Backups can go to a Google account, or you can save the data to the phone or send it by email and restore it later. Several accounts can be tracked in the same app.
It is free to start, with ads and in-app purchases. Simple Design Ltd. publishes the app and keeps a site at simpledesign.ltd.
Period Calendar Period Tracker pros and cons
Pros
- No account or real-name registration is required, so all features work anonymously.
- Reminders cover pills, rings, patches and injections, with editable notification text for discretion.
- Tracks flow, cervical mucus, basal body temperature, weight, moods and symptoms in one log.
- Backup to a Google account, phone or email, with restore.
- Wear OS complications and tiles for period, ovulation, water and pill reminders.
Cons
- Contains ads.
- Includes in-app purchases.
- The listed version is shown as varying, so no specific version number is available.
Is Period Calendar Period Tracker safe?
Install it from Google Play, where Simple Design Ltd. publishes it and links its developer website. Google Play rates the content Everyone. Before entering health details, review the permissions and data settings, and note that no independent audit is mentioned.
How to install Period Calendar Period Tracker
- Press the Google Play button on this page.
- Check the listing in the Play Store and press Install.
- Open Period Calendar Period Tracker when the install finishes. Updates arrive through Google Play.
