ActivityWatch

ActivityWatch is a free, open-source application that automatically tracks how you spend time on your computer and phone. It runs in the background, recording which applications you use and which websites you visit in your browser. All this data is stored directly on your device, giving you a detailed, private log of your digital activity without needing an internet connection or a subscription.

The tool works by installing a small desktop client for Windows, macOS, or Linux (with an Android app also available). Once running, it logs your activity out of the box. You can view your data through a simple web interface hosted locally on your machine. To get more detail on web browsing, you can add optional browser extensions for Chrome or Firefox. What sets ActivityWatch apart is its commitment to privacy and openness; it's a direct alternative to services like RescueTime, but with all your data kept under your control.

ActivityWatch is most useful for freelancers who need to bill clients accurately, students researching their study habits, or anyone curious about their own digital behavior. You can use it to see how much time you actually spend on social media, break down your workday by project, or try to improve your work-life balance by tracking your screen time. It's a practical tool for self-reflection and productivity management, built by volunteers for the long term.