Yes, 韩剧影迷记录营 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.
韩剧影迷记录营 is free.
To get estimated revenue of 韩剧影迷记录营 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.