LeafyOrbFertility Cycle Tracker · Health
Understand your cycle — privately.
Fertility Cycle Tracker learns from the periods you log and gives a calm, on-device estimate of your next period and fertile window. Designed to stay completely private: your data never leaves your phone.
Coming soon to the App Store and Google Play.
What it does
Cycle estimates
Logs your period start dates and estimates your next period from your own average cycle length.
A window, not a date
Shows an estimated fertile window as a range, because real cycles vary — never a false-precision single day.
Your range
See your cycles observed and your shortest–longest range, so the estimate is honest about its own uncertainty.
Private by design
- Your cycle data stays on your device — no account, nothing uploaded.
- Optional biometric lock (Face ID / fingerprint) to open the app.
- No ads, no data selling, no tracking.
- Any future backup is opt-in and end-to-end encrypted.
Privacy at a glance
Fertility Cycle Tracker keeps everything on your device, with no account and nothing uploaded. It can be locked behind Face ID or your fingerprint. Purchases are handled by Apple/Google and RevenueCat.
Full details are in the LeafyOrb Privacy Policy. For help, see Support or email support@leafyorb.com.