Yes, 플렘 - 원형 시간표 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.
플렘 - 원형 시간표 is free.
To get estimated revenue of 플렘 - 원형 시간표 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.