ActivityWatch is a free opensource app that automatically tracks how you spend time on your devices such as phones and laptops. Developed by Erik Bjäreholt, Johan Bjäreholt and contributors
License: Open Source
ActivityWatch is an open-source tool that offers extensive customization and offline tracking, making it suitable for tech-savvy users. In contrast, RescueTime provides a more user-friendly experience with automated tracking and advanced analytics, appealing to users who prefer a straightforward solution.