Spectrum Remote Apple Tv. All your tv, all in one app. But the live programming you can access on your apple tv depends on what package you subscribed to.
My apple tv (4k) remote was turning on and off my samsung just by waking and sleeping the apple tv. If you're ok with the original siri remote, then, by all means, stick with it. I spent all day on the phone with spectrum and apple trying to resolve a remote problem.
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The spectrum tv app, by default, opens to live tv streaming when launched, though you have other choices from the menu that appears at the top of the screen. Then add the spectrum tv app and get started. All your tv, all in one app. When i was using the spectrum equipment, i was able to type in a channel number and it would take me to that channel (of hit a button for last channel).