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arbtt vs Timing: catalog facts
arbtt	Timing
Free Free and open source under the GPL-2.0 licence.	Paid Paid, with a 30-day free trial that needs no credit card.
macOS, Linux, Command line	macOS
Fully automatic capture with no manual input Rules applied at query time so old data can be re-analysed	Automatic tracking of apps, websites and documents Rules that assign activities to projects over time
Requires writing a rules file to get useful statistics Command-line only, no graphical reports	macOS only Paid after the 30-day trial
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
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 September 23, 2026

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