Yes, Unicorn 3D 独角兽 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.
Unicorn 3D 独角兽 is free.
To get estimated revenue of Unicorn 3D 独角兽 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.