Ipad and Itouch apps

Do you have to have a computer, audio interface with DIN midi ports, and a DAW to send the midi to a Little Phatty from an app such as polysteparp, beatmaker, filtertron, when using an Ipad or Ipod touch? Or would a usb to din midi cable work for going directly from the Ipad to the moogs midi in port? I found this one but am not sure if it will do the trick. Thanks for any input.
http://www.meritline.com/usb-to-midi-adapter-cable---p-42337.aspx