Compare software

KRuler vs Free Ruler: catalog facts
KRuler	Free Ruler
Free Free and open source under the GPL-2.0 or later.	Free Free and open source, with optional donations.
Linux	macOS
Measures on-screen elements directly Small single-purpose utility	Measures in pixels, millimeters or inches Single-key shortcuts for every main action
Linux only Basic tool with a narrow purpose	macOS only Requires macOS Sonoma or later; older builds are on the releases page
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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