Yes, 日更计划 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.
日更计划 has several in-app purchases/subscriptions, the average in-app price is EGP 20.59.
To get estimated revenue of 日更计划 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.