Yes, 極限交通賽車遊戲 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.
極限交通賽車遊戲 is free.
To get estimated revenue of 極限交通賽車遊戲 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.