Android Apps
An Android app is a software application running on the Android platform. Because the Android platform is built for mobile devices, a typical Android app is designed for a smartphone or a tablet PC running on the Android OS.
IOS Apps
An IOS apps is a software application running on the Apple platform. Because the Apple platform is built for Apple devices, a typical IOS apps is designed for a smartphone or a tablet PC running on the Iphone OS.
Cross Platform Apps
A cross-platform computer product or system is a product or system that can work across multiple types of platforms or operating environments. Different kinds of cross-platform systems include both hardware and software systems.