Period Calendar Period Tracker: Health & Fitness Companion

Period Calendar Period Tracker is a health and fitness app by Simple Design Ltd. that helps predict menstrual cycles, ovulation, and fertile windows.

Developer: Simple Design Ltd.★ 4.89 (4,894,349)59 MBUpdated: Sep 10, 2026

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Period Calendar Period Tracker stands out with a high 4.89 rating from over 4.8 million reviews and a user base of more than 100 million installs. The app is free to download, though it contains ads and optional in-app purchases, and requires Android 6.0 or newer with a download size of 59 MB.

Screenshots

Monthly calendar view highlighting predicted period days and fertile window.

Cycle overview showing period length, ovulation date, and fertile days.

Daily log options for flow, symptoms, mood, and intimacy tracking.

Body temperature and cervical mucus chart for ovulation prediction.

Pill and period reminder settings with discreet notification options.

Pregnancy mode showing weekly baby size and development updates.

Backup and restore screen with encrypted data sync options.

Multi-account and security settings page with data deletion control.

Size: 59 MB
Requires Android: 6.0
Updated: Sep 10, 2026
Installs: 100M+
Rating: ★ 4.89 (4,894,349)
Category: Health & Fitness
Developer: Simple Design Ltd.
Content rating: Everyone
Package: com.popularapp.periodcalendar
Free: ✓ · Contains ads · In-app purchases

Period Calendar Period Tracker is a health and fitness app by Simple Design Ltd. that helps users track menstrual cycles, predict ovulation, and monitor fertility. It addresses the need for a reliable period diary that works for both those trying to conceive and those seeking birth control. The app predicts periods, ovulation, and fertile windows while allowing you to log daily symptoms, moods, temperature, and other health data. With a reported rating of 4.89 from millions of users, it aims to be a comprehensive tool for cycle awareness. It includes reminders for pills and periods, fertility tracking, and data backup options, making it a practical companion for everyday reproductive health management.

Key features

Period prediction and cycle tracking with ovulation and fertility calculators
Daily tracking of blood flow, cervical mucus, BMI, sexual activity, weight, temperature, symptoms, and moods
Customizable pill and period reminders with discreet notification text
Fertile symptom tracking, including cervical firmness and opening
Daily chance of conception display for family planning
Body temperature chart to help determine ovulation date
Data backup and restore via Google account, phone, or email
Multi-account support and timeline view for searching notes

How to install

Tap the download button on this page to get the APK file (59 MB).
When Android asks, allow your browser or file manager to install apps by enabling the 'Install unknown apps' setting.
Open the downloaded APK file from your notifications or file manager.
Tap 'Install' and wait for the installation to complete.
Open the app and start tracking your cycle. Note: the app requires Android 6.0 or higher.

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Pros

Free to download and use basic features
High user rating and large install base
Comprehensive tracking options for symptoms, moods, and fertility signs
Customizable reminders for periods and contraceptives
Data backup options for security
No account creation required for anonymous use

Cons

Contains ads
Includes in-app purchases
Requests location, photos/media/files, and storage permissions, which may raise privacy concerns for some users

Latest changes

The latest update brings a significant improvement 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 refined to feel smoother and more accurate.

Older versions

Version	Size	Requires Android	Updated
1.77.355.GP	51 MB	6.0	Oct 11, 2026
1.77.364.GP	56 MB	6.0	Sep 6, 2026
1.77.365.GP	59 MB	6.0	Sep 4, 2026
1.77.361.GP	55 MB	6.0	Aug 6, 2026
1.77.348.GP	48 MB	6.0	Apr 2, 2026
1.77.331.GP	29 MB	5.0	Jan 14, 2026
1.746.294.GP	20 MB	4.4	Jan 18, 2024

This app is suited for women who want a detailed menstrual cycle tracker, whether they are trying to conceive, avoiding pregnancy, or simply monitoring their cycle for health awareness. It is also useful for those who need reminders for contraceptive pills or want to track symptoms and moods over time. The multi-account feature may appeal to users who want to separate different types of data. Given the emphasis on fertility and ovulation, it is particularly relevant for family planning, but it also works as a general period diary for those with regular or irregular cycles.

To get the most accurate predictions, log your period start dates consistently and add symptoms or temperature readings daily. Use the backup feature to protect your data, and explore the reminder customization to keep notifications discreet.

Permissions

LocationPhotos/Media/FilesStorage

FAQ

What can I track in Period Calendar beyond my period dates?

Alongside period and cycle predictions, the app lets you log menstrual flow, cervical mucus and cervical firmness or opening, BMI, weight, body temperature, intimacy, symptoms and moods. It also works as a personal period diary where you can review or search your notes through a timeline.

Does the app send reminders for contraception as well as for my period?

Yes. Reminders cover your period, fertility and ovulation, and there is also a contraceptive reminder that handles pills, rings, patches and injections. The notification text can be customized so it stays discreet when it appears on your screen.

Can Period Calendar help if my cycles are irregular?

The app is designed to be useful for both irregular and regular periods. It predicts menstruation, cycles and ovulation, includes an ovulation calculator and fertility calculator, and shows your odds of conceiving on each day so you can plan accordingly.

What does the pregnancy mode include after the latest update?

The pregnancy tracker received a significant upgrade. You can follow your baby's size as it grows week by week and see what to expect for both you and your baby, with the experience described as smoother and more accurate.

How is my data handled, and can I remove it?

No account creation or real-name registration is needed, so all features can be used anonymously. Anonymous data can be synced in encrypted form to your own backup, and you can delete everything with a single click whenever you choose. The developer states that no data is collected or stored.

Period Calendar Period Tracker offers a robust set of tools for cycle tracking and fertility awareness, backed by a high user rating and a long history of updates. It is a practical choice for anyone seeking a free, feature-rich period tracker, though you should be comfortable with ads and the required permissions.