A smartphone operating system (OS) is essential engine which helps to run the smartphone smoothly. Operating systems of a smartphone manages both the software and hardware to create an easy user experience. Android, BlackBerry, iOS and Windows are the most common OS used in smart phone. In addition, increasing number of mobile devices and mobile users has fueling the smartphone OS market and is expected a significant growth during the forecast period. Rising use of mobile devices and growing dependency on smart phone in daily life the smartphone OS market in rising and is anticipated a positive growth during the forecast period. However, the complexity in design of smart phone is acting as a restraint of smartphone OS market. Many manufacturers are focusing on this matter and they are trying to make it user friendly, therefore the impact of this restraint is medium and is expected to be low during the forecast period. The smartphone OS market is segmented into tw...