One of the best known, and well-regarded, Android keyboards, SwiftKey will be coming to iOS “soon,” promises the vendor’s website. (It’s been available as a native iOS note-taking app.) The prediction engine learns not only your typing patterns, but how words work together and can sometimes suggest the next word before you start typing it. Options let the keyboard learn your patterns from your email, SMS, and social media interactions. Flow, introduced in version 4, lets you glide your fingers from one key to the other continuously. Smart Space figures out where to insert spaces as you type.