activitywatch

Install command: 
brew install --cask activitywatch

Name: ActivityWatch

Time tracker

https://activitywatch.net/

/api/cask/activitywatch.json (JSON API)

Cask code on GitHub

Current version: 0.12.1

Analytics:

Installs (30 days)
activitywatch 55
Installs (90 days)
activitywatch 157
Installs (365 days)
activitywatch 636
Fork me on GitHub