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Luteal vs drip: catalog facts
Luteal	drip
Free Free and open source under GPL-3.0-or-later.	Free Free and open source.
Android	Android, iOS
Labels recorded observations separately from estimates Tracks symptoms and basal body temperature	All data stays on the device Supports the symptothermal method for fertility awareness
Android only. Predictions are estimates; the app makes no diagnosis.	No sync between devices Fertility features depend on careful manual tracking
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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