Seems like a waste of money. It’s all things we have the WBO for and ourselves. For Good combos we have the Build me a combo and for steadying your hand you can do by yourself.

Camp for people who are new to the game maybe?

What would you learn from it or gain from it? If you want to learn how to make good combos use the WBO.

Is this for America too

I checked the play store just now and sadly it's only in Japan currently. But it's only early stages so I'm sure they'll release a worldwide version soon

Does anyone have an ipa file of the app?