Compare software

Flo vs Clue: catalog facts
Flo	Clue
Best for: People tracking their menstrual cycle, ovulation or pregnancy on a phone	Best for: People who want to track their menstrual cycle on their phone
Free + paid options Free to download, with a paid premium subscription.	Free + paid options Free app with a paid subscription for additional features.
Android, iOS	Android, iOS
Tracks periods, ovulation and pregnancy in one app Symptom logging alongside cycle dates	Cycle predictions and personalised insights Available on both iOS and Android All 3 strengths for Clue Cycle predictions and personalised insights Available on both iOS and Android Science-based approach to content
Proprietary service that handles sensitive health data Some features require a paid subscription	Some features require a subscription Sensitive health data is handled by a commercial service
Downloadable app, Hosted service	Downloadable app
Not open source	Not 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	Not stated if it works offline
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 Clue helloclue.com play.google.com/store/apps/details apps.apple.com/us/app/clue-period-cycle-tracker/id657189652 Catalog checked September 23, 2026

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