I think this is a great way to really drum the algs. into your brain. Yeah youre not building the muscle memory but you cant do that without knowing the algs. cold. Helped me with the 5x5. Yeah sure its clunky and you wont be setting records with it, but its a cube on a smart phone, how perfect do you want it?
My only complaint and reason why I give it 4 stars is how the screen darkens and even gets the little x for the ads in the paid version. No ad plays but its mildly annoying for the app to go non-responsive for a couple seconds.
OakFF252 about Rubik's® Cube, v2.5