Yes, 小宝识车辆学英语:认交通工具大巴士宝典 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.
小宝识车辆学英语:认交通工具大巴士宝典 is free.
To get estimated revenue of 小宝识车辆学英语:认交通工具大巴士宝典 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.