Yes, 密函-寻真爱 上密函 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.
密函-寻真爱 上密函 has several in-app purchases/subscriptions, the average in-app price is 112.79 ₪.
To get estimated revenue of 密函-寻真爱 上密函 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.