ActivityWatch is an app that automatically tracks how you spend time on your devices. It is the best free and open-source time tracking software for Windows, macOS, Linux, and Android.
It is privacy-first and cross-platform, and a great alternative to services like RescueTime, ManicTime, and WakaTime. Unlike closed-source time trackers, your data stays on your device — never uploaded to the cloud.
Use it as an activity tracker or productivity tracker to monitor time spent on different projects, manage screen time habits, track work hours, or just understand how you spend your day.
Good News! ActivityWatch has been added to the catalog as of yesterday - https://patchmypc.com/catalog-release-history/2026-releases/