SwiftKey is doing something unusual. Its long been one of the most popular paid Android add-ons to date, but apparently thats not good enough. For about a buck each (or a few dollars for sets of themes), SwiftKey hopes youll be willing to shell out for access to designs that will change the look of something you use on your phone numerous times each day. This is a critical shift for us, SwiftKeys chief marketing officer, Joe Braidwood, says.