activitywatch

Install command: 
brew install --cask activitywatch

Name: ActivityWatch

Time tracker

https://activitywatch.net/

Development: Pull requests

Cask JSON API: /api/cask/activitywatch.json

Cask code: activitywatch.rb on GitHub

Current version: 0.13.2

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
activitywatch 214
Installs (90 days)
activitywatch 532
Installs (365 days)
activitywatch 1,465