Yes, 卖炭翁智慧司机端 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.
卖炭翁智慧司机端 is free.
To get estimated revenue of 卖炭翁智慧司机端 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.