Compare software

Perfice vs Exist: catalog facts
Perfice	Exist
Free Free and open source under the MIT licence.	Paid Subscription service with a free trial.
Android	Web
Track any custom value, not just preset categories Shows correlations between tracked items	Combines automatic syncing with manual tracking Finds correlations between habits and outcomes
Correlations need consistent logging over time to be useful Little documentation on the homepage	Paid after the trial Relies on connecting third-party services
Downloadable app	Web application, Hosted service
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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