App Description from Google Play
Welcome to the SwiftKey beta program - here you can test early performance updates, new unreleased features, customizations, and special themes. Thanks for helping us make SwiftKey the best it can be!
The SwiftKey beta app for Android will not replace the regular SwiftKey app on your phone, but will be downloaded as a second app so you can switch between the two for comparison.
Features in the beta app are in active development and might not work perfectly or ever be released to the main SwiftKey app.
How you can help make SwiftKey better
As a beta tester, we rely on you to help us find bugs and give us feedback on new features. To give us feedback or report any bugs, head on over to our Support Forums.