Duo is a dual-paned web browser 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.
What's new in version 1.0
ReleaseDecember 20, 2013
Date AddedDecember 20, 2013
Operating SystemsMacintosh, Mac OS X 10.8, Mac OS X 10.9