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Natural Cycles vs drip: catalog facts
Natural Cycles	drip
Best for: People looking for hormone-free birth control or fertility tracking	Best for: People who want to track their cycle without sharing health data with a company
Paid Subscription service; prices are not listed on the homepage.	Free Free and open source.
Android, iOS	Android, iOS
FDA-cleared as a birth control app Covers contraception, pregnancy planning, postpartum and perimenopause All 3 strengths for Natural Cycles FDA-cleared as a birth control app Covers contraception, pregnancy planning, postpartum and perimenopause Works with an overnight band and other compatible devices	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
Less effective than an IUD, with 93% typical-use effectiveness Requires regular temperature or biomarker measurements All 3 limitations for Natural Cycles Less effective than an IUD, with 93% typical-use effectiveness Requires regular temperature or biomarker measurements Pricing not listed on the homepage	No sync between devices Fertility features depend on careful manual tracking
Downloadable app	Downloadable app
Not open source	Open source
License not stated	License not stated
Account 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 Natural Cycles naturalcycles.com play.google.com/store/apps/details apps.apple.com/us/app/natural-cycles-fertility-app/id765535… Catalog checked September 24, 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.