Existing customers continue to get updates and support. This app has all the features and functionality of SwiftKey Keyboard.
This app is marked "legacy" as new customers should buy the merged app.
More information here http://bit.ly/sktabupgrade
New in 4.4.6 - Google+ and Gmail authentication working now with accounts not registered on the phone
New in 4.4.5 - Added the ability to personalize from Evernote notes and Google+ public posts
See more at http://support.swiftkey.net/knowledgebase/