Dev tools · alternatives · 2026

24 alternatives to Viewport

All in one user testing tool for websites on your iOS device

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Viewport launched in 2016; newer entries below may have overtaken it.

1
Test your website on 180+ device viewports (with multi-device mode)▲74
Hey HN! We do a lot of frontend testing, and one thing we find frustrating is the limited tooling available to observe how a URL renders on different viewports/devices simultaneously. For example, we can use Chrome Inspector's "Device" previews, but we run into the following: - Chrome doesn't keep those devices/viewports up to date, and adding new ones is pretty annoying (we've open sourced our collection of 180+ viewports/dimensions under MIT). - You can’t see multiple viewports at once (and it’s cumbersome switching back and forth) - When you notice a problem, there's no…
2024 · viewport-tester.com · its alternatives →
2
InVision Mobile Testing▲140
New free, unlimited user testing for mobile prototypes
2015 · its alternatives →
3DW
Detect which iOS devices are used on your site▲166
2018 · dieulot.fr · its alternatives →
4
Multi Screen Test▲216
Test your site at different screen resolutions & devices.
2015 · its alternatives →
5
Viewport▲54
Showcase your design process from concept to completion
2024 · viewport.co · its alternatives →
6
Responsive View▲216
Test your responsive design across different devices
2016 · responsiv.eu · its alternatives →
7
Mobile FIRST▲207
Smartphone and tablet simulator in the browser
2023 · webmobilefirst.com · its alternatives →
8
Homescreen▲245
A tool for sharing your home screen and discovering apps
2014 · comingsoon.markmonitor.com · its alternatives →
9
Mobile Web Accessibility Checker▲73
Evaluate mobile websites for accessibility
2016 · apps.apple.com · its alternatives →
10
Monochrome▲88
Browser with fixed iPhone5 viewport
2014 · lucianmarin.com · its alternatives →
11
iDisplay▲159
Use your iOS/Android device as an extra display
2016 · apps.apple.com · its alternatives →
12
InVision + UserTesting▲277
A free integration for better user research
2016 · its alternatives →
13
Based▲205
Sketch UI kit for feeds on iOS, Android and web
2016 · getstream.io · its alternatives →
14
Inspect▲206
Inspect and debug your web apps on iOS & Android devices
2020 · inspect.dev · its alternatives →
15
Replica 3.0▲327
Mirror your iOS screen on a modern web browser
2021 · its alternatives →
16
Viewports▲97
Figma plugin to set screen sizes with market share in mind
2019 · figma.com · its alternatives →
17
Inspect – DevTool to debug Safari and WebViews on iOS devices▲75
Agent-first mobile web debugging for iOS and Android. Give Claude, Codex, Cursor, and other coding agents real-device DOM, console, network, and screenshots.
2020 · inspect.dev · its alternatives →
18
Curator▲95
A visual notes app for iPad
2014 · curator.co · its alternatives →
19
iOS Stack▲213
A curated collection of iOS resources for app builders
2016 · iosstack.com · its alternatives →
20
Vision▲126
Check your sight online
2015 · vision.vega9.com · its alternatives →
21
iOS 10 GUI for iPad▲188
A massive free fully customizable UI Kit
2017 · iosdesignkit.io · its alternatives →
22
Form▲203
Interaction & prototyping design tool for iOS apps
2014 · m3.material.io · its alternatives →
23
Frame.io for iOS▲140
Real-time video collaboration, now with a native iOS app
2016 · frame.io · its alternatives →
24
Plex 4.0 for iOS▲114
All your movies, TV shows, music, and photos at your fingers
2015 · plex.tv · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →