Compare software

Clue vs Luteal: catalog facts
Clue	Luteal
Best for: People who want to track their menstrual cycle on their phone	Best for: People who want a private menstrual cycle tracker on Android
Free + paid options Free app with a paid subscription for additional features.	Free Free and open source under GPL-3.0-or-later.
Android, iOS	Android
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	Labels recorded observations separately from estimates Tracks symptoms and basal body temperature All 4 strengths for Luteal Labels recorded observations separately from estimates Tracks symptoms and basal body temperature Exports consultation summaries as PDF or HTML Optional encrypted sync
Some features require a subscription Sensitive health data is handled by a commercial service	Android only. Predictions are estimates; the app makes no diagnosis.
Downloadable app	Downloadable app
Not open source	Open source
License not stated	License: GPL-3.0-or-later
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 Clue helloclue.com play.google.com/store/apps/details apps.apple.com/us/app/clue-period-cycle-tracker/id657189652 Catalog checked September 23, 2026	Official website Full listing and sources Sources for Luteal github.com/JoeriKaiser/luteal Catalog checked October 8, 2026

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