Yes, 独立费 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.
独立费 has several in-app purchases/subscriptions, the average in-app price is 260.78 đ.
To get estimated revenue of 独立费 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.