pixelsnap

Install command: 
brew install --cask pixelsnap

Name: PixelSnap

Screen measuring tool

https://pixelsnap.com/

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

Cask code: pixelsnap.rb on GitHub

Current version: 2.6.1

Requirements: macOS >= 10.14

Analytics:

Installs (30 days)
pixelsnap 31
Installs (90 days)
pixelsnap 81
Installs (365 days)
pixelsnap 380