Yes, 三国单机 - 三国霸业 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.
三国单机 - 三国霸业 is free.
To get estimated revenue of 三国单机 - 三国霸业 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.