As I see world is totally moving into mobiles with their applications. Mobile applications are getting popularity in such a way that almost half of the total population is into mobile apps. Now retailers don't have their beautifully decorated store rooms they just go into customers mobile with the means of mobile applications. Now a single click can get you whatever you need that too in the place where you are. After the release of iPhone along with its default mobile applications made things easier for people to get things and to entertain themselves. Mobiles are now used for advertisement purpose now no more digital method or banners displayed now they personally move towards customers through their mobile phones. Now there are plenty of mobile applications which are best used by all individuals starting from a little child hearing a story to a business man having his online updates instantly in his mobile apps. Even women use these mobile applications. Who said mobiles are only for men now more than men it is proved that women are now using their mobile apps. Usually Smartphone look heavy to carry and quite long but now it's not the same, recent release iPhone 5 came with its slim and light weighted aluminum made which made women feel quite easy to carry their Smartphone. Usually whenever people are in need of a stuff they move on to browsing but now it's not the thing they automatically to for app store and find the application what they need then install it and use whenever they are in need. There are many app developers who are into making unique applications in the platform which they prefer. Selecting the platform is the major part that they need to decide. As there are many demands for applications there is competition as well it's like they are directly proportional to each other. So app developers should select their apt platform. Retailers are very interested in having their mobile based websites and applications which they find quite interesting. There are many platforms like iPhone, RIM, Android and many others. Retailers almost fell in knot to know what platform actually they should select. But it's quite easy check with the applications in a certain platform if you feel your app is much new to that platform then go with it.