Yes, 家庭记账 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.
家庭记账 has several in-app purchases/subscriptions, the average in-app price is USD 6.66.
To get estimated revenue of 家庭记账 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.