The new RescueTime looks great!

I used to use RescueTime many years ago, until I got uncomfortable with storing all my data on their servers, and unsatisfied with the closed source nature of it all (limiting my ability to fix issues and add features I wanted).

I started building an open source replacement in 2016, was joined by a few friends, and it has gotten pretty good (people really like it!): https://github.com/ActivityWatch/activitywatch