Yes, 卓著雲端樂譜 is free to download, however it contains in-app purchases or subscription offerings.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
卓著雲端樂譜 has several in-app purchases/subscriptions, the average in-app price is ¥15.00.
To get estimated revenue of 卓著雲端樂譜 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.