The reasons for multiple platforms: The power of choice
Android by Google and iOS by Apple are the two dominant mobile operating platforms that run their own application marketplaces-commonly called app stores that provide the apps that their users need. However, once you have zeroed into the device you really want, the next fight is filling it up with all the amazing apps available on the operating platform of your choice.
The world of mobiles is diverse-with thousands of devices in the market, one is hard-pressed for choice at any price point.