I just found out about the iOS version of the Channels app, which I’ve been using the tvOS version on my AppleTV for a few months now. I’ve also been trying out a competing app called InstaTV Pro, on both iOS and tvOS which I only paid “once” for the Dolby license. I went to the Apple App Store on my iPad just a few moments ago to find the app and that if I wanted that, I would have to pay yet another $15. This is a no sell for me, InstaTV Pro is looking more I will probably be using instead in the future. Most other apps offered through the Apple App Store covers fees (etc.) for the two different os’s, which I am disappointed you decided to go the opposite route here.
Also consider that I’ve already purchased InstaTV Pro for my iOS (and tvOS) devices, I have no use for the Channels app on the former. Add to that, they have HDHomeRun DVR support in their latest release, with the DVR component available by Silicondust, I see no need or desire for a Channels App DVR at this time, nor in the foreseeable future.