Yes, BOXFiSH每日外教英语 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.
BOXFiSH每日外教英语 is free.
To get estimated revenue of BOXFiSH每日外教英语 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.