Yes, 名古屋ホワイトニングラボ 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.
名古屋ホワイトニングラボ is free.
To get estimated revenue of 名古屋ホワイトニングラボ app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.