Apple has started identifying apps with support for the new Apple TV in the App Store.
To check if an app supports the Apple TV, search for it on your iPhone, then scroll down on the app's details page to the Information section. You will see an Apple TV indicator if the app supports the device.
Take a look at the image below for an example.
To check if an app supports the Apple TV, search for it on your iPhone, then scroll down on the app's details page to the Information section. You will see an Apple TV indicator if the app supports the device.
Take a look at the image below for an example.