Viewport is a dedicated browser to help designers and developers test and develop responsive websites.

Viewport works with local or hosted sites and provides the following features

- Ability to set multiple viewports with fixed dimensions or width ranges
- Full page screenshots of all open breakpoints (great for portfolios)
- Full webkit web inspector for easy debugging
- Screen recording of breakpoints so you can demo your designs and show how layouts adapt
- User testing mode on breakpoints with FaceTime camera support so you can record a users reaction and comments on your designs
- Automatic breakpoint detection so you can see how existing sites are using media queries

Viewport is retina ready and is optimised for Yosemite

Ratings and Reviews

Serious bugs to work out


This application shows promise, but as previous reviewer mentioned, there’s no way to “backspace” in the URL bar. Upon second launch of the app, all I get is a gray screen. Worked fairly well after I first installed and upon first use, but unusable right now. Would definitely like a refund.

Frustrating. Needs more testing.


1. When you type a URL in the address bar, you can’t backspace is you make an error. Bizarre.

2. Only seems to recognize some of the CSS of the webpages, not all of it. Websites that break when displayed at mobile breakpoints in Viewport don’t break when actually tested on mobile devices.

3. The actual application window is difficult to resize, what’s the point of a browser that you can’t control and push off to the side so you can see your other applications?

Don’t waste your money. Wait till they fix it.


moople apps
1.6 MB
Developer Tools
Age Rating
You must be at least 17 years old to download this app.
Unrestricted Web Access
© Moople 2014


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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