Yes, エクストリームバイクの交通レーサー 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.
エクストリームバイクの交通レーサー is free.
To get estimated revenue of エクストリームバイクの交通レーサー app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.