Which Menstrual Cycle Tracking App Fits You Best?

From data privacy to predictive power — here’s what really matters when choosing your app.

Tracking your cycle used to mean circling a few dates on a calendar. Today, it’s a science-backed habit that can unlock deep insights into your energy, mood, and overall health. Modern menstrual tracking apps can help you recognize patterns in sleep, stress, and hormones, even before your body does.

But as powerful as these tools have become, they also raise a new question: what happens to the data you share?

Cycle trackers collect some of the most personal information possible: your symptoms, emotions, sexual activity, and health history. And while this data can be incredibly useful for understanding your body, it’s also sensitive. Some apps use strong encryption and local storage; others rely on cloud systems that may allow broader access.

So, which apps strike the best balance between useful insights and responsible privacy?

We looked at seven popular menstrual cycle tracking apps and compared their key features — from accuracy and analytics to privacy, integrations, and pricing. The goal: to help you find a tracker that fits your health goals and your comfort level.

Cycle Tracking Apps

	Cycle Prediction	Symptom Tracking	Ovulation / Fertility	Integration	Privacy & Security	Analytics & Insights	Pricing Model	Unique Features
Flo	Yes	Yes	Yes	Apple Health, Google Fit	Enhanced privacy controls (FTC reforms)	Detailed analytics, Q&A, symptom history	Freemium	AI suggestions, extensive community
Clue	Yes	Yes	Yes	Apple Health	High privacy reputation	Cycle patterns, prediction accuracy	Freemium	Research partnerships, regular / irregular cycle support
Period Calendar (P Tracker)	Yes	Yes	Yes	Limited	Basic privacy features	Simple calendar and logs	Free	Pill reminders, charitable impact
MyCalendar	Yes	Yes	Yes	Apple Health	Password protection	Simple graphing and notes	Free	No-frills approach, highly reliable
Stardust	Yes	Yes	Yes	Apple Health	Emphasis on privacy / ad-free experience	Mood and flow-level logs, graphing	Free	Import from Flo, partner data sharing
Euki	Yes	Yes	Yes	Android, iOS	Best-in-class privacy, open source	Minimal analytics, private local storage	Free	Max privacy: user data stays on device
Belle	Yes	Yes	Yes	None	Complete privacy, ad-free	Accurate predictions, simple stats	Free	Focus on privacy / no subscription

Flo and Clue stand out for their advanced analytics, diverse tracking, and community support, which are ideal for users who want rich insights and guided recommendations. Euki and Belle, on the other hand, take a privacy-first approach, keeping all data securely on your device with no tracking or ads. Stardust, MyCalendar, and Period Calendar each bring something unique, from simplicity to user engagement, proving there’s no one-size-fits-all approach to cycle tracking.

💬 How do you track your cycle?

If your favorite app isn’t on the list, tell us about it in the comments! Your experience might help someone else find their perfect fit.