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Qbserve vs arbtt: catalog facts
Qbserve	arbtt
Paid Paid app with a 15-day free trial.	Free Free and open source under the GPL-2.0 licence.
macOS, Browser extension	macOS, Linux, Command line
Tracks time automatically without manual timers Project tracking from window titles, documents and pages	Fully automatic capture with no manual input Rules applied at query time so old data can be re-analysed
macOS only Paid after the trial	Requires writing a rules file to get useful statistics Command-line only, no graphical reports
Downloadable app, Browser extension	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
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.