Period Calendar Period Tracker

Period Calendar Period Tracker is a health and fitness app by Simple Design Ltd. that predicts menstrual cycles, ovulation and fertile windows while letting you log daily symptoms, moods and other cycle-related details. Cycle tracking is often scattered across paper calendars or generic notes, which makes patterns hard to see and predictions unreliable; this app centralizes that information in one place and turns it into forecasts for upcoming periods and fertile days. It aims to serve both people trying to conceive and people using cycle awareness as part of birth control, and it works for irregular as well as regular cycles. On the privacy side, the app states that no account creation or real-name registration is required and that all features can be used anonymously. It also says anonymous data can be synced in an encrypted manner on your own, that you can delete all data with one click, and that it does not collect or store your data. Those are the developer's claims rather than independently verified facts, so it is worth reading them critically. The app is free to download, is ad-supported and offers in-app purchases, and it requests Location, Photos/Media/Files and Storage permissions. It requires Android 6.0 or newer and the download file is 59 MB.

Key features

• Period and ovulation prediction with a fertility calculator that estimates your chance of conceiving on a given day
• Logging of menstrual flow, cervical mucus, cervical firmness and cervical opening for fertility awareness
• Body temperature charting to help identify the ovulation date, plus support for entering ovulation test results
• Records for intimacy, weight, BMI, symptoms and moods, searchable through a personal timeline
• Discreet, customizable notification text for period, fertility and ovulation reminders
• Contraceptive reminder covering pills, rings, patches and injections
• Multi-account support with security protections and the option to view or search all notes
• Backup and restore to phone or email, with optional encrypted sync tied to a Google account
• Pregnancy mode that shows the baby's size week by week and what to expect
• Wear OS complications and tiles for period and ovulation predictions, water reminders and pill reminders

How to install

1. Tap the download button on this page to get the APK file (59 MB).
2. When Android asks, 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 file manager.
4. Tap Install and wait for the process to finish.
5. Open the app; it runs on Android 6.0 or newer.

What's New

Pregnancy Mode received a major update. It now shows the baby's size growth week by week and provides weekly expectations for both parent and baby. The pregnancy tracker is also smoother and more accurate overall.

This app suits people who want a single place to record cycle history and get forward-looking estimates of periods, ovulation and fertile days, whether their cycles are regular or irregular. It is relevant to those trying to conceive, to those using fertility awareness alongside other birth control methods, and to anyone who wants reminders for contraceptive pills, rings, patches or injections. Users who value anonymous use, multi-account separation and the ability to delete their data in one step will find those options relevant, though they should weigh the requested permissions and the ad-supported, in-app-purchase model before installing.

Before installing, review the permission prompts and grant only what you are comfortable with; Location and file access are not strictly needed for basic logging, so you can often deny them and still use core features. Use the customizable notification text so reminders do not reveal sensitive details on your lock screen. If you rely on backup, set it up early and test a restore so you know your data can be recovered. Treat fertility predictions as estimates and combine them with other methods if avoiding pregnancy matters to you. Check the in-app purchase options before committing to paid features.

Period Calendar Period Tracker packs cycle prediction, fertility logging, reminders and backup into one free, ad-supported app that can be used without an account. Its privacy claims are appealing, but the broad permissions and advertising mean you should decide based on your own comfort level.