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MediLog vs Harp: catalog facts
MediLog	Harp
Free Free and open source under the GPL-3.0 licence.	Free Free on F-Droid; the Play Store version is paid as a way to support development.
Android	Android
Tracks many vital signs in one app Charts with trends and thresholds	Data kept as plain Org Mode files you own No accounts, servers or analytics
Android only Data entry is manual	No built-in sync; bring your own tool Org Mode format is unfamiliar to many users
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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