Channels on Shield TV - 2 apps?

Just getting setup with a Shield Pro. I see two versions of the Channels app - one free called "Whole Home DVR" and one that's $24.99? I assume the one with a price tag is the server? If one has a paid subscription, how does one NOT pay that? Or do I just have it all wrong?

IGNORE: Just found a third Channels software on the google store Channels DVR Server. That's what I was looking for. Thanks!