Yes, 新卷快报-低价有好货 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.
新卷快报-低价有好货 is free.
To get estimated revenue of 新卷快报-低价有好货 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.