FondFont: Install System Fonts

I have downloaded it and I cant make out what I am supposed to do

I eventually got Calibri font to work on my iPad but only by trial and error, as no instructions are apparently available within the app or anywhere online. This is how I did it: Having installed the app, I selected my iOS device in the iTunes sidebar and tapped Apps at the top of the screen. Then I went to File Sharing at the bottom, selected FondFont and dragged the font I wanted to its list from the Library on my Mac. Then opened the app on the iOS device, selected the font and tapped Install at top right of screen. This added to the Settings a Profile that is labelled in red as 'unsigned' which doesn't inspire great confidence. But when I then opened a document in Pages which had been written in Calibri on my Mac, I no longer got the warning that Calibri was unavailable and the font reproduced well.

막상 구매하고 설치하려고 보니 내실력으론 설치 불가… 환불해 주지도 않을것이고….사용자 리뷰를 잘 보시고 자신있는분만 받으세요 저처럼 돈버리고 시간 버리지 않으려면…..

폰트 인스톨까지는 됐는데 다른어플에서 폰트를 사용할수가 없네요;; 환불부탁드려요;;

등록안되네요

설명도 없고 이상한 글씨로만 계속 뜨고 눌러서 들어가면 아이폰 설문 조사창?만 계속 뜨네요 환불해주세요

무슨 폰트 다운 받으려고 파일을 다운 받아도 뜨지도 않고 이거 뭔가요 .. 2200원이나 주고 다운 받았는데 사기 당한 기분이네요? 당장 환불해주세요;;

방금 결제했늠데 환불좀해주세요

방금 샀는데 버튼도 없고 기능이 막혔나보네요 신고해야하나요.." 2천원은 돈 아닌가요"…

Don’t work refund my money please