Yes, 思维导图-脑图神器 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.
思维导图-脑图神器 has several in-app purchases/subscriptions, the average in-app price is SAR 179.99.
To get estimated revenue of 思维导图-脑图神器 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.