I’m confused. Is it just news and sports? Is there AMC? Is there Animal Planet???
The app only works if you have an antenna or cablecard with a hdhomerun tuner box. See http://getchannels.com/faq
All the channels that your hdhomerun can pick up are tunable with Channels. If you are using an antenna, this is generally ABC, NBC, CBS, Fox, The CW, MyTV, Univision, PBS, and all the subchannels of these. Some people who live in remote rural areas far from the broadcast towers have trouble pulling in all of these stations.