Yes, 叢林瘋狂賽跑者:犯人生存3D 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.
叢林瘋狂賽跑者:犯人生存3D is free.
To get estimated revenue of 叢林瘋狂賽跑者:犯人生存3D app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.