Compare software

xScope vs Free Ruler: catalog facts
xScope	Free Ruler
Paid Paid app with a free trial.	Free Free and open source, with optional donations.
macOS	macOS
Many measurement tools in one app Loupe with color copying and vision impairment simulation	Measures in pixels, millimeters or inches Single-key shortcuts for every main action
macOS only, requires 12.3 or later Paid after the trial	macOS only Requires macOS Sonoma or later; older builds are on the releases page
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.