Thanks for those codes. I'll check it out but I will not stop writing my app. However I would be happy to help you improve your app for us PKUers.
My program will work on Mac, Windows, Unix, Linux and AIX for any geeks out there like me that use AIX. I will accept donations from people once my site is up and running. Its not like PKU targets people based on their economic situation where as people who can afford an iPhone problably don't mind spending money on apps. If you read the terms and conditions of sales on apples app store you will see that All sales are final