Fern: Period and Cycle Tracker
Private. Secure. Beautiful.
Only for iPhone
Free · In‑App Purchases · Designed for iPhone
iPhone
NEW: Pregnancy mode with week-by-week development tracking! Switch seamlessly between period and pregnancy tracking. Your privacy, always protected.
Fern is the period and pregnancy tracker that puts your privacy first. No account required. No cloud sync by default. No tracking or analytics. Your intimate health data stays on your device, exactly where it belongs.
PERIOD TRACKING MADE SIMPLE
• One-tap period logging - start and end your period with a single button
• Smart predictions based on YOUR cycle history, not opaque algorithms
• Beautiful calendar showing past periods, predictions, and fertile window
• Log symptoms, moods, and notes for complete cycle awareness
• Detailed statistics showing your average cycle and period length
PREGNANCY MODE
When you're ready, switch to pregnancy tracking with a single tap:
• Week-by-week baby development with size comparisons and milestones
• Track weight, blood pressure, and pregnancy symptoms
• Kick counter with timer and haptic feedback
• Prenatal appointment scheduling with reminders
• Bump photo diary to capture your journey
• 42 weeks of detailed guidance from conception to birth
PRIVACY FEATURES THAT PROTECT YOU
• Face ID & Touch ID protection
• Passcode lock for extra security
• DECOY MODE: Enter a different passcode to open the app with mock data - perfect for when someone demands to see your phone
• All data stored locally - your information never leaves your device
• Optional encrypted iCloud backup - only if YOU choose
• No account, no registration, no tracking
BEAUTIFUL DESIGN
• Soft, feminine aesthetic with thoughtful animations
• 6 gorgeous themes: Rose (free), Lavender, Sage, Ocean, Sunset, Midnight
• Clean interface designed for daily use
• Dark mode support with Midnight theme
FREE FEATURES
• Complete period tracking and predictions
• Cycle calendar with fertile window
• All privacy and security features
• Basic symptom and mood logging (5 per day)
• Full pregnancy tracking mode
PREMIUM FEATURES
• Unlimited daily symptoms
• 5 additional beautiful themes
• PDF reports to share with your doctor
• Advanced cycle statistics
• Priority support
TRANSPARENT PREDICTIONS
Unlike apps that use mysterious algorithms, Fern's predictions are simple and transparent:
• We average your last 6 cycles
• Fertile window calculated from expected ovulation (14 days before next period)
• You can see exactly how predictions are made
YOUR DATA STAYS YOURS
We built Fern because we believe intimate health data deserves the highest protection. We don't:
• Require an account
• Collect analytics
• Share data with third parties
• Store your data on our servers
• Track your behavior
Fern is the cycle tracker for people who value their privacy. Download now and take control of your health data.
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Privacy Policy: https://geba89.github.io/fern-website/privacy.html
Terms of Use: https://geba89.github.io/fern-website/terms.html
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
The developer, Piotr Gebski, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Piotr Gebski
- Size
- 1.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Fern Premium Lifetime $6.99
- Copyright
- © 2026 Piotr Gebski. All rights reserved.