shottr

Install command: 
brew install --cask shottr

Name: Shottr

Screenshot measurement and annotation tool

https://shottr.cc/

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

Cask code: shottr.rb on GitHub

Current version: 1.9

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
shottr 1,471
Installs (90 days)
shottr 4,250
Installs (365 days)
shottr 15,626