Ghostlab is described as 'Whether you want it or not, your site is going mobile - every day. Use Ghostlab to make sure all your users get the same neat experience - whatever operating system, browser or smart phone they are using' and is an app in the Development category. There are three alternatives to Ghostlab for a variety of platforms, including Android, iPad, iPhone, Mac and Windows. The best alternative is Browsersync, which is both free and Open Source. Other great apps like Ghostlab are DOMScope (Free) and Muir (Freemium).
Muir is a mobile browser testing app without all the strings of cloud based suites. Simply download the desktop app, install the client on your mobile devices, and get to work. - Browse to any web page in Chrome or Firefox. Your mobile devices will follow suit instantly.