Flo Ovulation & Period Tracker: Health & Fitness App

Flo Ovulation & Period Tracker is a health and fitness app by Flo Health Inc. that helps users log menstrual cycles, predict ovulation, and follow changes across different life stages. It has been available since April 2016 and has accumulated a large user base, with more than 100 million installs and a rating of 4.72 from over 5.1 million ratings. The app is free to download and includes optional in-app purchases.

The core idea is to turn daily logging into patterns that are easier to understand. Users can record periods, including irregular ones, along with more than 70 trackable symptoms and moods, and then review clear summaries that can be shared with a doctor. For those trying to conceive, the app offers fertile window and ovulation predictions based on logged period data, plus basal body temperature tracking. During pregnancy, it switches to week-by-week updates, visuals, and expert-reviewed content, while later life stages are covered through a Perimenopause Score, a Menopause Timeline, and a tracker for sleep, energy, mood, and well-being.

Privacy is a central theme here. Flo states that it holds dual ISO 27001 and ISO 27701 certifications and was recognized in 2025 at the PICCASO Privacy and Security Awards for its information security team. An Anonymous Mode lets users work with the tracker without linking a name, email, or other personal identifiers. The Android permission list is short and practical: access to photos, media, and files, storage, and Wi-Fi connection information. There are no ads. The app is informational and educational only and is not a method of birth control or a conception aid.

Key features

• Cycle tracking for regular and irregular periods, with predictions and pattern summaries over time
• Over 70 trackable symptoms and moods for more personalized cycle insights
• Ovulation and fertile window predictions based on the period data you log
• Basal body temperature (BBT) tracking for those exploring conception insights
• Pregnancy tracking with weekly updates, visuals, and expert-reviewed content
• Perimenopause tools including a Perimenopause Score, a Menopause Timeline, and symptom logging
• Anonymous Mode for using the tracker without linking your name, email, or personal identifiers
• Secret Chats for connecting with members who share tips and personal experiences
• Wear OS 3 support with tiles and complications for cycle insights on a watch
• Free core tools, with optional Flo Premium features such as tailored insights, expert-led videos, and a 24/7 virtual Health Assistant

How to install

1. Tap the download button on this page to get the APK file for Flo Ovulation & Period Tracker.
2. When Android asks, allow your browser or file manager to install apps — this is the "Install unknown apps" setting, and it can be turned off again afterward.
3. Open the downloaded APK file from your notifications or your file manager.
4. Tap Install and wait for the process to finish. The available file size is not specified, so check the download progress rather than a fixed number.
5. Open the app once installation completes. It requires Android 10 or newer to run.

What's New

This release focuses on behind-the-scenes improvements to enhance overall app stability and performance. The update is part of ongoing efforts to make the tracking experience smoother for the Flo community.

This app suits people who want to follow their menstrual cycle over time, whether their periods are regular or irregular, and who value having privacy controls such as Anonymous Mode. It is also aimed at those exploring conception insights, at people who want week-by-week pregnancy guidance, and at users who want to understand perimenopause symptoms. Anyone looking for medical advice, diagnosis, treatment, or contraception should look elsewhere, since the app does not provide those.

Take a moment to review the Android permissions during installation and confirm that photos, media, files, storage, and Wi-Fi connection information match what you expect the app to need. If privacy is your priority, turn on Anonymous Mode early so your logs are not tied to your name or email. Logging consistently makes cycle and ovulation predictions more useful, and the shareable summaries can be a practical starting point for a conversation with a qualified health care professional. Remember that the app is educational and informational, so treat predictions as guidance rather than certainty.

Flo Ovulation & Period Tracker offers a broad, privacy-conscious way to follow cycles, conception insights, pregnancy, and perimenopause in one place. It is free to download, ad-free, and backed by a large user base, though premium features require in-app purchases and the app needs Android 10 or newer. If its permission profile and educational scope fit your needs, use the download button on this page to get started.