Yes, 英语一年级上下册北京课改版 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.
英语一年级上下册北京课改版 is free.
To get estimated revenue of 英语一年级上下册北京课改版 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.