Compare software

drip vs Periodical: catalog facts
drip	Periodical
Free Free and open source.	Free Free and open source under the GPL-3.0-or-later licence.
Android, iOS	Android
All data stays on the device Supports the symptothermal method for fertility awareness	Calculates fertile days and tracks symptoms and notes Backup to a single compressed file on local storage
No sync between devices Fertility features depend on careful manual tracking	Calendar method is not reliable for contraception Simple feature set compared with commercial cycle trackers
Downloadable app	Downloadable app
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
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 October 2, 2026

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