Yes, 圓形魚鏡頭相機 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.
圓形魚鏡頭相機 has several in-app purchases/subscriptions, the average in-app price is 8.00 H$.
To get estimated revenue of 圓形魚鏡頭相機 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.