Compare software

drip vs Flo: catalog facts
drip	Flo
Free Free and open source.	Freemium Free to download, with a paid premium subscription.
Android, iOS	Android, iOS
All data stays on the device Supports the symptothermal method for fertility awareness	Tracks periods, ovulation and pregnancy in one app Symptom logging alongside cycle dates
No sync between devices Fertility features depend on careful manual tracking	Proprietary service that handles sensitive health data Some features require a paid subscription
Downloadable app	Downloadable app, Hosted service
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.