Hue Sync doesnt work

Hello,
I bought the Entertainment-Package because I only need the Hue-Sync function on my Smartphone, and it works on the smartphone very well. But when I try to run the Hue Sync function on my TV(Chromecast Ultra) the app says I have to upgrade the app to Premium to use it or 30 Sec trial. Do I have to buy it on my TV too? But why it works on the smartphone without 30 Sec. trial