Yes, 芒果绘本 is free to download, however it contains in-app purchases or subscription offerings.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
芒果绘本 has several in-app purchases/subscriptions, the average in-app price is 186.57 S/.
To get estimated revenue of 芒果绘本 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.