is an app testing service that lets you test and interact with Android, iOs and web apps on many devices at once.
No need to purchase and maintain a collection of devices for you dev and qa testing anymore.
you can perform automated testing and manual testing with through remote access to interact with a real device through the browser.
Devices are non-rooted and any appropriate app can be installed.
you can simulate real world environments, selecting languages, locations and so on.