My app asks the user to fill in and save a form locally. I want him to be reminded 48 hrs after the app has been closed that he has a pending form. Is push notification the only way out? Does it cost money to use a provisioning service?
                +2 
                A: 
                
                
              iPhone OS 4 adds timer-based alerting for apps that aren't running. See here for a brief description. I'm guessing this means that push notifications are your only option prior to version 4.
                  Marcelo Cantos
                   2010-05-02 10:38:46
                
              Thanks ... that makes it clear.
                  
                   2010-05-02 11:04:04
                Care to tick it as the accepted answer? (I'm shooting for 10k rep today! :-)
                  Marcelo Cantos
                   2010-05-02 11:15:19
                done ... it indeed was very helpful :)
                  
                   2010-05-02 11:50:09
                Thanks a million; that got me over the line! :-) :-) :-)
                  Marcelo Cantos
                   2010-05-02 12:07:01