With iOS 7, you can use any keyboard you want — as long as it's Apple's stock keyboard. Android, on the other hand, allows you to replace its default keyboard with any of a dozen third-party alternatives. Our favorite of those keyboards is SwiftKey, which learns from your typing patterns and then uses that knowledge to predict what word you'll type next and offers it to you as a suggestion. Want to swipe from one letter to the next in iOS? You're out of luck.