Apple today updated TestFlight with support for WatchKit apps on Apple Watch and minor stability and performance improvements. Starting today, developers will no longer have to exclude their WatchKit extensions for Apple Watch when seeding a beta iOS app to testers through TestFlight.
TestFlight is a beta testing service that enables developers to seed pre-release versions of their apps to select individuals for testing. The expanded support for WatchKit is a timely update, arriving just moments after the official App Store for Apple Watch apps went live. iTunes Connect may still not accept apps with WatchKit extensions for some until the changes roll out to all developers.