Yes, 拼音熊玩單字 (台灣注音版) 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.
拼音熊玩單字 (台灣注音版) is free.
To get estimated revenue of 拼音熊玩單字 (台灣注音版) app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.