iOS : bubble text?

Any idea开发者_如何学运维 what's the code for getting text with every letter in bubble like here :

Take a look :

http://apps.su/program/24939/bubble-your-text.html

All it seems to be doing is converting the letters into these unicode characters: http://www.bubbleballtext.com/unicode

Update

Here you go, it's called 'Enclosed Aphanumerics' - http://unicode.org/charts/nameslist/c_2460.html