Apple has updated its TestFlight app to version 1.2.0, which adds support for testing upcoming iOS 9 features such as watchOS 2 apps and App Thinning.
TestFlight lets you install and beta test apps on an iOS device. After a developer invites you to beta test their app, you can install new versions as they become available. TestFlight also allows you to provide feedback to developers on the features you are testing in the prerelease apps you’ve been invited to.
With the new version, testers can now choose how to receive update notifications for each app they’re testing. Also, watchOS 2 beta apps will install automatically when the “Automatic Downloads” setting is turned on in the Apple Watch app. TestFlight is a free download at the Apple App Store.