Yes, 진단수학 중학 학부모 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.
진단수학 중학 학부모 is free.
To get estimated revenue of 진단수학 중학 학부모 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.