Load font at runtime

Hi ! I'm making an app that must load it's font from a file situated in it's directory (at runtime) , so anyone can change the .ttf font file - , anyway , can this be made ? and if we can't , is there's any way to convert the .ttf to .png file with unity and then be used by the app? I'm using Javascript and c# , and i'm sorry for my english x_x