A Boolean value indicating whether the Watch app is installed on the currently paired and active Apple Watch.
- iOS 9.0+
The user can choose to install only a subset of available apps on Apple Watch. The value of this property is
true when the Watch app associated with the current iOS app is installed on the user’s Apple Watch or
false when it is not installed.
The value in this property is valid only for a configured session that has been activated successfully. If the
activation property is available, its value must be
WCSession. When the session becomes inactive or deactivated, you should ignore the value in this property.