Yes, 可愛的小豬貼紙 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.
可愛的小豬貼紙 is free.
To get estimated revenue of 可愛的小豬貼紙 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.