A versatile working framework, likewise called a portable OS, is a working framework that is particularly intended to keep running on cell phones, for example, cell phones, cell phones, PDAs, tablet PCs and other handheld gadgets. The portable working framework is the product stage which comprise of key application, Middleware and working framework keep running on cell phones. Portable working framework sorts: Symbian OS (Nokia) Bada (Samsung Hardware) BlackBerry OS (Exploration In Movement) Palm OS (Garnet OS) Windows Portable (Windows Telephone 7) Android OS (Google Inc.) iPhone OS/iOS (Apple) Among all these Portable OS, two of them are exceptionally prevalent. iOS Android We recognized some normal distinction in the middle of these two Versatile OS. iOS: iOS is a stage that has some prohibitive rules. As the iOS is not an open source, so the apparatuses are restricted and settle for the improvement of the iOS applications. Nothing is from outside, simply expected to take after what are given in the rule. This implies iOS is not very adaptable. The purpose for this is iOS does not trade off on security. Tradeoff the product improvement contends that we should need to bargain one of the requirements from accessibility and security. So iOS plate shape is confined and there is nothing profound for the advancement. There is no malware assault in iOS. Probability of information misfortune is half. iOS does not give full get to control to its clients. Application endorsement for play store takes a great deal of times. There are numerous limitations while transferring an application to play store. 90% iOS gadgets keep running on the most recent overhauls of iOS. Paid applications are accessible in 155 nations. iOS applications are produced in target c or quick. Android: Android is a plate shape comprises of three layers, working framework, center layer and application. Android is not just the OS. However, it is the mix of these three layers. Android is so adaptable, as it permits outsiders instruments. It is on account of android is an open source plate shape. Android can trade off on security. Malware can without much of a stretch assault on information in android. Plausibility of information misfortune is 75%. It gives full get to control to the clients. Endorsement of applications for play store is snappy, inside 6 to 8 hours. Rule is adaptable of play store. 0.4% runs the most recent rendition of Android. Paid applications are accessible in 132 nations. Android applications are produced in java.