Cycle Sister
Period & Fertility Tracker
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Gentle period reminders up to a week ahead, a guided first-time tutorial, and no full-screen ads. Track your cycle privately on your device.
Cycle Sister is a private, local-first period and fertility tracker. Log your period cycles, track predictions for next cycle, fertile window, ovulation day, and safe windows. All data is kept 100% secure and stored locally on your device.
Key features include:
• Period start and length logging
• Predictions for next periods and ovulation days
• Color-differentiated safe/ovulation/predicted periods
• Multi-profile support for recording multiple people (Pro features)
• Local backup and restore with strong password encryption
Privacy Policy: https://sites.google.com/view/cycle-care-app/privacy
Terms of Use: https://sites.google.com/view/cycle-care-app/terms
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Period reminders are here — get a gentle heads-up a few days before your next period, so you're always prepared.
New
• Period reminders: schedule a warm reminder 1–7 days before your next predicted period, and choose exactly how early.
• Help & tutorial: a built-in help page plus a step-by-step walkthrough for first-time users, in your language.
Improved
• No more full-screen ads — Cycle Sister opens straight to your calendar.
• A faster, lighter start so you can log your cycle right away.
The developer, CloudSpirit Limited, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- CloudSpirit Limited
- Size
- 32 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 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
16+
- 16+
- Contains
Advertising
Health or Wellness Topics
- In-App Purchases
Yes
- Yearly Premium $9.99
- Monthly Premium $0.99
- Copyright
- © CloudSpirit 2026