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Perfice vs moreDays: catalog facts
Perfice	moreDays
Free Free and open source under the MIT licence.	Free Free with no ads, under the GPL-3.0.
Android	Android
Track any custom value, not just preset categories Shows correlations between tracked items	Combines goals, journaling and mood tracking Tracks weight, sleep and custom numbers
Correlations need consistent logging over time to be useful Little documentation on the homepage	Android only Small developer with limited documentation
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-only
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it 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.