It seems the question of the moment is "to charge", or "not to charge" for the custom apps. Both sides have valid arguments, but here is a third option. Do both.
Release the full version (after bugs have been squashed) and charge for it - pricing structure TBD. There will definitely be demand for the apps. Maybe do some giveaways to increase publicity.
After an amount of time (again, TBD), make the apps free to anyone. This would be another boon to the community and good publicity.
This is how money is made!
One ultimate Marketing Strategy for Keycoin. 
To sell KeyOS in every store around world on the rack where gift cards are sold. Now everyone can shop with, trade & own Crypto Currency! Plug and Play Baby.

Even a child can do it.
Once the account is activated by plugging in, a portion of the 25 dollars is converted to KEYS based on the current market prices. The end user can start trading Keys immediately without purchasing Bitcoin but can still immediately buy Bitcoins with their KEYs.
http://i57.tinypic.com/kf4951.jpg