Period Calendar Period Tracker: Menstrual & Ovulation Tracking App

Period Calendar Period Tracker is a health and fitness app by Simple Design Ltd. that helps you predict and record menstrual cycles, ovulation, and fertile windows. Many people find it challenging to keep track of irregular cycles or remember to take birth control, and this app addresses those problems by acting as a detailed, all-in-one diary and reminder system. It allows you to log a variety of symptoms and body signals, from blood flow and weight to cervical mucus and temperature, to build a clearer picture of your reproductive health over time. The tool also includes a pregnancy mode, discreet notifications for pill reminders, and secure data backup options.

Key features

• Predicts upcoming periods, ovulation, and fertile windows based on logged cycle data.
• Customizable pill reminder supports contraceptives including pills, rings, patches, and injections.
• Discreet notification text can be set for period and fertility alerts to maintain privacy.
• Tracks a wide range of body signals such as cervical mucus, basal body temperature, and mood.
• Provides a daily conception chance indicator for family planning or birth control awareness.
• Backs up and restores data securely using a Google account, phone storage, or email.
• Supports multiple accounts with timeline search for managing different profiles.
• Integrates with Wear OS complications and tiles for quick access to predictions and reminders.

How to install

1. Tap the download button on this page to get the APK file, which is about 59 MB in size.
2. If prompted, allow your browser or file manager to install apps by enabling the 'Install unknown apps' setting for that application.
3. Open the downloaded APK file to begin the installation process.
4. Tap 'Install' and wait for the process to complete on your device.
5. Once installed, open the app and start setting up your cycle tracking. The app requires Android 6.0 or newer.

What's New

The latest update, released on September 10, 2026, brings a major upgrade to Pregnancy Mode. You can now watch your baby's size grow week by week and see what to expect for both you and your baby. This update also delivers a smoother and more accurate pregnancy tracking experience.

This app is suited for anyone who menstruates and wants to better understand their cycle, whether they have regular or irregular periods. It is particularly helpful for those trying to conceive, individuals who want a discreet birth control pill reminder, and users who prefer to track intimate health data without creating a public account.

To improve prediction accuracy, consistently log your menstrual flow, basal body temperature, and any ovulation test results over several cycles.

Overall, this tracker provides a comprehensive and private way to understand your cycle, whether you are planning a pregnancy or simply want to stay informed. Its combination of detailed tracking, reminders, and strong data control makes it a practical tool for daily use.