Yes, 山海经-图鉴典藏版 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.
山海经-图鉴典藏版 is free.
To get estimated revenue of 山海经-图鉴典藏版 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.