Yes, 生日蛋糕制作鸭 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.
生日蛋糕制作鸭 is free.
To get estimated revenue of 生日蛋糕制作鸭 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.