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