Yes, 工业园区预警应急响应系统 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.
工业园区预警应急响应系统 is free.
To get estimated revenue of 工业园区预警应急响应系统 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.