MyWi is an IPhone application in order to create a WiFi spot using your IPhone. It works like a charm in IPhone but...
If you are thinking in using it for IPad, my advice: Do not use it!!
I did it, and my brand new IPad became a really big IPhone! , it changed my virtual keyboard to a small keyboard (like the IPhone one).
It was funny to see a big IPhone but actually
touch screen became unresponsive, so I restored again to the original OS. You always can restore to the original software using the ITunes Restore option.