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LT Browser vs Screenfly: catalog facts
LT Browser	Screenfly
Freemium Free to download, with paid tiers as part of the TestMu AI platform.	Free Free to use in the browser.
Windows, macOS, Linux	Web
Views several device viewports side by side More than 50 device screen presets	Covers phone, tablet, desktop and TV screen sizes Nothing to install
Device views are emulated rather than real hardware Tied to a commercial testing platform with paid tiers	Shows resized views rather than rendering on real devices Only useful for publicly reachable pages
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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