Ditto is compatible with:
How to Set Up Apple TV 4K/Apple TV HD as a Ditto Receiver
Step 1
Download the Ditto tvOS Receiver app from the App Store on your Apple TV.
Step 2
Open the Ditto tvOS Receiver app. You will see a pairing code. 
Step 3
Log in to your Ditto Account Portal, click on the "Receivers" tab, and click "New Receiver" (or “Add Your First Receiver” if you haven’t added a receiver yet).
Step 4
Enter the pairing code displayed on the Apple TV and click "Pair Receiver." 
Step 5
That's it! Your Apple TV 4K or Apple TV HD will be paired to your Ditto account as a receiver. Next, add the receiver to a room. Learn how to set up rooms.
Note:
You may create as many receivers as you want. You are not billed until you pair a room to a receiver to create an “active” room.