Compare
Responsive testing tools, compared honestly
Most tools show your site on many screens. UICheck finds what’s wrong on them. Here is what each kind of tool is for, where UICheck fits, and when to use two together.
Mobile-friendly tests
Quick “does this work on a phone?” checks.
Responsive viewers
Show your site at many sizes for you to look at.
Device clouds
Real devices and browsers to test by hand or with scripts.
Visual regression
Compare screenshots with an approved version in CI.
Change monitoring
Watch pages and get an alert when they change.
Feedback tools
Collect marked-up feedback and bug reports from clients.
Design overlays
Lay the design over the page to compare by eye.
At a glance
What each kind of tool does
| UICheck | Responsive viewers | Device clouds | Visual regression | Design overlays | |
|---|---|---|---|---|---|
| Finds layout bugs automatically | — | With your own tests | Shows changes | — | |
| Every screen size in one run | You look at each | You open each | Sizes you script | — | |
| Safari and Firefox engines | Some tools | — | |||
| Compares with the Figma design | — | — | — | By eye | |
| Plain-language fixes for each problem | — | — | — | — | |
| Report you can hand to a client | — | Team dashboards | Team dashboards | — | |
| Alerts when a page’s text or look changes | — | — | On each CI run | — | |
| Real physical devices | — | — | — | — | |
| No install or test code | Desktop apps | Scripts for automation | SDK in CI | Extension |
General picture by kind of tool; individual products differ. Each comparison page has the details.
Where UICheck fits
One tool from design hand-off to after launch
Most teams stitch together a viewer, a feedback tool and a monitor. UICheck answers the question at each stage of a client site, built for agencies and freelancers without a QA team.
- Stage 1Design hand-off
“Does it match the Figma?”
Instead of
- Stage 3Before launch
“Is it right on every screen?”
Instead of
- Stage 5After launch
“Did something change, or come back?”
Instead of
When another tool fits better
- Real phones and tablets in your hand
- Pixel tests written inside your own test suite
- Pages you don’t own, checked every few minutes
Questions
What is the best responsive testing tool?
It depends on the job. To find layout bugs on every screen size without setup, use an automatic checker like UICheck. To test on real physical devices, use a device cloud such as BrowserStack or LambdaTest. To catch visual changes in CI, use visual regression such as Percy. Many teams use two of them together.
What replaced the Google Mobile-Friendly Test?
Google retired the Mobile-Friendly Test and the Mobile Usability report in December 2023 and recommends Lighthouse. Lighthouse covers speed and best practices on one phone size; UICheck’s free Mobile-Friendly Test checks the layout on a phone and lists each problem.
Is UICheck a BrowserStack alternative?
For layout and responsive QA, yes: it tests every screen size automatically and reports the bugs. It does not offer real physical devices, so for device-specific behaviour such as payment sheets or the on-screen keyboard, a device cloud is still the right tool.
Is UICheck a Marker.io alternative?
For agencies, yes: clients and visitors send marked-up feedback from the live site or comment on screenshots of every screen size, and it becomes issues in Linear, Jira, GitHub or Worksynk. UICheck also finds layout bugs itself and checks the fix. Marker.io connects to more trackers and has screen recording and session replay.
Is UICheck a Visualping alternative?
For your own and your clients’ sites, yes: monitoring emails you when a page’s text changes (shown as before → after), when it looks different on any screen size, when a watched word appears or disappears, and when something new breaks. For pages you don’t own, or checks every few minutes, a change monitor like Visualping fits better.
Do I need to write tests or install anything?
No. Paste a URL and UICheck runs the page in real Chrome, Safari (WebKit) and Firefox engines in the cloud.
How are these comparisons kept fair?
They are based on each product’s public information, with the date it was checked on every page. If something has changed, tell us through Support and we’ll update it.
See what UICheck finds on your site
Free account, 5 checks a day, no card. Paste a URL and get every layout bug on every screen.