颠倒黑白 助纣为虐
诋毁别人博流量
Yes, 龙泉热线 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.
龙泉热线 is free.
To get estimated revenue of 龙泉热线 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.