Yes, 证件照制作-专业版 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.
证件照制作-专业版 has several in-app purchases/subscriptions, the average in-app price is €1.49.
To get estimated revenue of 证件照制作-专业版 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.