Doesn't work whatsoever – Sketchar: AR Drawing App Review

I tried this app, since it had a very good concept, and was thoroughly disappointed. I tried to draw those crosses, but it doesn't specify where to draw them. When I drew them the best I could, it didn't understand. It's not working at all, and I hope the developers can fix it, as it has a lot of potential.
Review by My dog is adorable on Sketchar: AR Drawing App.