There are two ways: Installing with SSH, or installing with iFunBox.
For both, you must install AppSync from Diatrus repo: https://diatr.us/nito/
iFunbox
Just download the cracked app from AppCake, plug in Apple TV 4 with usb-c chord, and click install app on iFunBox.
SSH
This method is better for the AppleTV 4K, because 4K cannot use iFunBox. Download cracked app onto your computer, and copy it over to the AppleTV with WinSCP or FileZilla. On NitoTV, install AppInst from Diatrus repo. Then, over SSH run 'appinst /path/to/ipa/'. It will install the app for you!