SketchupHelper aims at helping you to practice using Sketchup, even when you're not around your PC or can't access the program itself.
There's easy to understand classes, quizzes you can take to test your knowledge and a quick-access reference sheet to help you while modelling.
This app has no "social features" or "gamification", the only person you're measuring yourself against, is you. The only incentive is your own. I created this app purely because it was something I was looking for, for my own sake, when I started out myself.
SketchupHelper is not affiliated with Sketchup or the owners of Sketchup in any way.