UICheck vs Responsively App

Responsively App is a free, open-source desktop app that shows your site on many device sizes at once and mirrors your clicks and scrolling across all of them. It is a great way to look. UICheck is for finding: it tests each screen size in a real browser, measures what’s wrong, and gives you a report with a fix for each problem.

UICheck

Responsively App

What it isUICheck: Automatic responsive and layout QA for any URLResponsively App: Free open-source desktop app to preview many devices

How you testUICheck: Paste a URL; findings are listed for youResponsively App: Look at every device preview yourself

InstallUICheck: Nothing, runs in the cloudResponsively App: Desktop app

Finds bugs automaticallyUICheck: Yes: overflow, cut-off text, overlaps, spacing, tap targets, forms, accessibilityResponsively App: No, you spot them by eye

Mirrored clicks and scrollingUICheck: Yes, on the live site view (Prism)Responsively App: Yes

Report for clientsUICheck: Plain-language fixes, share link without login, PDF and ExcelResponsively App: Screenshots

PriceUICheck: Free plan; paid plans from $5 a monthResponsively App: Free

Based on public information, checked October 2026. Something changed? Tell us and we’ll update it.

Choose Responsively App if

You want a free tool to preview many sizes at once while developing
You are comfortable spotting layout problems by eye

Choose UICheck if

You want bugs found for you, including ones that are easy to miss (text cut off without scrolling, gaps between breakpoints)
You need a report for a client or teammate
You want Safari and Firefox rendering and whole-site checks