Lim, who is now fluent in six programming languages, first started using a computer when he was two-years-old, discovered programming aged seven, and has since completed more than 20 programming projects.
His latest application, Doodle Kids, allows users to draw pictures using their fingers and then clear the screen by shaking the iPhone.
Pretty impressive, huh? Not to his father!
"Ding Wen is an above average boy with an interest in computers, especially Apple IIGS and Macs, likes to do programming, and that's it. Doodle Kids is an extremely simple program that can be done by anybody. Everybody can program - if Ding Wen can, so can you," he wrote.
Wow, dad, don't be too proud. "Who, Din Wen? Eh, he's nothing special. And just between you and me -- I think he's retarded. Mother's side of course."
Nine-year-old writes iPhone code [bbcnews]
Thanks to Lisa, who was programming VCRs at four.