Add data to a separate app?

I want to make it easy for people to keep their info when upgrading my app to the pro version. How can i send data from the free app to the pro app once they have it on their iPhone? I'm sure i've seen this开发者_运维问答 done before.

You can register a custom URL scheme and send the data via such an handler. Have a look at http://iosdevelopertips.com/cocoa/launching-your-own-application-via-a-custom-url-scheme.html