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Mac App Store

Mac App Store is the simplest way to find and download apps for your Mac.

To download Duo from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.

Duo

By Electric Pulp

Open the Mac App Store to buy and download apps.

Description

Duo is a dual-paned web browser built for Responsive Web Design (RWD) that lets you browse the web in two views: your standard ‘desktop’ view as well as a typical ‘mobile’ view. By seeing these two views at the same time, you’re able to quickly test and work through multiple screen experiences rather than considering them separately.

Whether you’re a designer or a developer, project manager or client, Duo gives you a new tool to make your Responsive Web Design project go more smoothly than ever.

Get the bookmarklet: http://helloduo.com

• MOBILE VIEW
Duo gives you an adjustable mobile view using the left pane.

• TABLET / DESKTOP VIEW
The right pane defaults to an adjustable tablet / desktop view.

• SYNCHRONIZED BROWSING
Navigating in either pane updates the other. No need to reload layouts to view pages at different sizes.

• WEBKIT DEV TOOLS INCLUDED
Duo has everything you need to make sure your design is doing what it should. Debug code in either pane.

• CONVENIENT KEY COMMANDS
Duo includes tools for clearing your cache and getting rid of those pesky cookies via standard key commands.

• HANDY BOOKMARKLET
Use the convenient bookmarklet in your other browsers to push a site over to Duo. Get the bookmarklet: http://helloduo.com

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WHAT IT ISN'T
Duo is designed for Responsive Web Design, not for user-agent sniffing. Duo also only refreshes both views for GET requests. It's probably not a good fit for your POST refresh heavy project, although we are actively looking at ways to accommodate this.

LET US KNOW YOUR THOUGHTS
You can email help@helloduo.com for support, or reach out to us on Twitter: @electricpulp. Thanks!

What's New in Version 1.2

You’d like preset breakpoints, you say?
Why yes, we have that. Snap to popular breakpoints with Option+Drag.

Want access to breakpoints in your toolbar?
Check the Customize Toolbar panel and add the new Breakpoints dropdown menu.

Can’t remember what widths you’re running?
Hover over the bottom right corner of each pane to view it's current dimensions.

Thanks for using Duo!

Screenshots

Screenshot 1
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Screenshot 3

Customer Reviews

Makes Responsive Development a Dream

The first version was great, but the latest updates have cemented it as a key app in my workflow. The ability to quickly see what your site looks like at different sizes had made development more efficient by an order of magnitude.

I used to dread making a site responsive, but now it’s a pleasure.

Duo
View in Mac App Store
  • $4.99
  • Category: Developer Tools
  • Updated: Apr 19, 2014
  • Version: 1.2
  • Size: 1.7 MB
  • Language: English
  • Seller: Electric Pulp

Compatibility: OS X 10.8 or later, 64-bit processor

Customer Ratings

We have not received enough ratings to display an average for the current version of this application.
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