Yes, AR大颗粒-未来基地 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.
AR大颗粒-未来基地 is free.
To get estimated revenue of AR大颗粒-未来基地 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.