Compare software

Flo vs drip: catalog facts
Flo	drip
Best for: People tracking their menstrual cycle, ovulation or pregnancy on a phone	Best for: People who want to track their cycle without sharing health data with a company
Free + paid options Free to download, with a paid premium subscription.	Free Free and open source.
Android, iOS	Android, iOS
Tracks periods, ovulation and pregnancy in one app Symptom logging alongside cycle dates	All data stays on the device Supports the symptothermal method for fertility awareness All 4 strengths for drip All data stays on the device Supports the symptothermal method for fertility awareness Transparent about how predictions are calculated APK available outside Google Play
Proprietary service that handles sensitive health data Some features require a paid subscription	No sync between devices Fertility features depend on careful manual tracking
Downloadable app, Hosted service	Downloadable app
Not open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for Flo flo.health play.google.com/store/apps/details apps.apple.com/us/app/flo-cycle-period-tracker/id1038369065 Catalog checked September 23, 2026	Official website Full listing and sources Sources for drip dripapp.org f-droid.org/packages/com.drip apps.apple.com/us/app/drip-period-cycle-tracker/id1584564949 Catalog checked September 23, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.