Open-source automatic time tracking tool for Linux, Windows, and macOS that captures window titles and active applications every minute, then applies user-defined rules to categorize time retroactively. Written in Haskell, arbtt keeps raw data intact allowing rule refinement over time without losing historical information.

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Charm is a cross-platform time tracking software tailored for professionals, offering tools to log and manage billable work hours.

arbtt (automatic, rule-based time tracker) is a desktop daemon written in Haskell that records window titles and active applications every minute, then uses powerful customizable rules to categorize and analyze your computer usage patterns.