Fern: Period and Cycle Tracker

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