There are no demos available in the App Store, we know this. No try before you buy, no download now, pay later. According to Erica Sadun at Ars Technica, even mentioning demo in your verbiage, like beta, will get you a swift kick in the rejection button. Free "Lite" versions are the only way to go.
Zach Epstein over on the Boy Genius Report wonders out loud why Apple, in its infinite usability, can't create a mechanism where Apps get downloaded free, and then expire after a short period of time unless you decide to buy and keep them.
So, does Apple really not know how to handle App Store demos yet? Or do they suspect, as TiPb does, f that demos would kill the $0.99 novelty App (and CrApp) impulse-buy business dead? After all, how many would really not tire of the gags before the demo period expired?
I'll fess up that the Lil John "YEAH!" "OKAY!" "WHAT!" travesty App would never have eaten my $0.99 had there been a demo! What percentage of Apps you've bought, do you think having had a demo period wouldn't have made sure you didn't buy instead?