SwiftKey, one popular option, has become the No. 1 free app on the App Store and has been downloaded over a million times. Other keyboard apps like Swype are also tearing up the charts. In fact, right now 3 of the “Top 5 Paid Apps” and 3 of the “Top 5 Free Apps” are all keyboard apps! Namely, these are Swype, Fleksy, ColorKeyboards, SwiftKey, CoolKey and Kiwi.