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PixelSnap vs KRuler: catalog facts
PixelSnap	KRuler
Paid Paid licence with a 30-day money-back guarantee.	Free Free and open source under the GPL-2.0 or later.
macOS	Linux
Fast edge detection for measuring on-screen objects Snappable guides and multiple object measurement	Measures on-screen elements directly Small single-purpose utility
macOS only Paid with no free tier	Linux only Basic tool with a narrow purpose
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0-or-later
Not stated if an account is 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.