Compare software

Length vs KRuler: catalog facts
Length	KRuler
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the GPL-2.0 or later.
Linux	Linux
Measures anything visible on screen Supports several units, including pixels and centimetres	Measures on-screen elements directly Small single-purpose utility
Linux only Small project with few contributors	Linux only Basic tool with a narrow purpose
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-2.0-or-later
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.