About a year ago, I made this silly video talking a coloring book app while filling in a drawing of a child kicking a hellish monster in the 'nads. For some reason, it's the third video that comes up when you search for "coloring book app" on YouTube.
ColorWolf, a new coloring book app, approached me and asked if I'd make a video talking about their app. I obliged. Here is that video, and you get get ColorWolf by tapping the link under the embedded video.
Download for iOS: https://itunes.apple.com/us/app/colorwolf-adult-coloring-books-pages-2017/id1217827412?mt=8
Download for Android: https://play.google.com/store/apps/details?id=com.blondeagames.art.coloring.book&hl=en