Yes, Dream Link (梦幻连连萌) 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.
Dream Link (梦幻连连萌) is free.
To get estimated revenue of Dream Link (梦幻连连萌) app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.