As I followed the Stanford course on iOS programming with Swift I got into drawing on storyboard and gesture recogniser. To use this features in real app I build two simple apps. FaceIt which used tap and swipe gestures to change mimic of a drawn face. And StickMan - this one is the first real life application of trigonometry functions for me :D. At the end I joined this two project to have StickMan with FaceIt head, but I couldn't find this project. But I was lucky enough to buid this two apps with some small changes and upgrade to Swift 4.0.