best Android TV apps to watch shows and movies


hello, I just bought a Beelink Android TV box online. It is on its way, might be delivered by next Tuesday.
Here is my question: which is a free Android app to watch popular US TV shows and movies online? Could you recommend some useful apps that you consider them really helpful?
There are many apps that lets you watch tv shows online. If you want to go the straight way there are apps such as netflix. If you want free ways you can download freeflix.