PearPetal is a private, peer-to-peer menstrual and fertility cycle tracker.
Your cycle data lives only on your own devices - no accounts, no servers, no
cloud, and no third party in the middle. Not even we can see it.

Your cycle blooms on a signature petal dial, and your next period, fertile
window and ovulation are predicted right on your phone. You can give a partner
a scoped, read-only view of exactly what you choose, and end it any time.

Features:

A living petal dial and month calendar, driven by on-device predictions
Log period, flow, symptoms, mood, notes and basal body temperature (BBT)
Goal-aware: tracking, trying to conceive, avoiding, or pregnancy mode
Adjusts for conditions (PCOS, endometriosis, thyroid) and birth control
Scoped, consented, read-only partner sharing that you can revoke
Optional discreet reminders and password-encrypted backups
End-to-end encrypted peer-to-peer sync; no account, no server