PERIOD. Cycle & Period Tracker
Ovulation, hormones, mood, AI
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
PERIOD. — the honest cycle app from the Netherlands.
Privacy isn't a feature. It's the foundation.
We don't sell your data. We don't share it with advertisers, "partners," or anyone else. No trackers. No ad SDKs. No data brokers. Your cycle, your data — never for sale.
We just help you understand your body.
WHAT'S INSIDE
- Period and cycle tracking
- Ovulation and fertile day predictions
- Symptom logging — energy, mood, sleep, skin, libido, pain, cramps and more
- Cycle phase explanations: follicular, ovulation, luteal, menstrual
- AI cycle questions tailored to you
- Pregnancy and fertility tracking
- Calm, considered design — none of the dark UX tricks you're used to
WHY WE'RE DIFFERENT
Most cycle apps were built by men, for women, with your data as their business model. Period trackers sat at the centre of multiple privacy scandals — most famously a 2021 FTC settlement where one major app was found sharing user data with Facebook.
We built PERIOD. because we wanted something different. We're a small, Dutch, female-led team. Our founder Lisa uses the app every day. Every design decision starts with: would I want this?
PRIVACY, BY DESIGN
- Cycle and health data stored on EU servers (Frankfurt), encrypted in transit and at rest
- No tracking pixels, no behavioural ads, no third-party SDKs
- Export or delete everything, any time
- GDPR-compliant by default
- Full sub-processor list at myperiod.app/sub-processors
The basics stay free. We're a young app — not everything is built yet. But we're building openly, listening to the women who use it, and trying to be the cycle app you'd actually recommend to a friend.
If that sounds like something you've been waiting for — welcome.
— Lisa & the PERIOD. team
Amsterdam
Ratings & Reviews
Minor text and translation updates across the app, plus a clearer consent screen for the AI assistant. Small polish — fewer rough edges.
The developer, Diederick Trampe, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Contact Info
- Identifiers
- Sensitive Info
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Diederick Trampe
- Size
- 6.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- Copyright
- © PERIOD., 2026