Yes, 天才子供のためのABCアルファベット is completely free and it doesn't have any in-app purchases or subscriptions.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
天才子供のためのABCアルファベット is free.
To get estimated revenue of 天才子供のためのABCアルファベット app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.