Review: iOS 9 delivers polish and stability

Over the last couple of years, iOS has rightfully come under criticism for being less than rock-solid stable. This year's version appears to be aimed at offering better performance, increased stability and a more predictive user experience in which the operating system tries to anticipate user needs.[ Related: 7 tips and tricks for iOS 9 ]In addition, iOS 9 is packed with refinements and new features that try to anticipate and volunteer useful information to users based on what they're doing, al