[Ken Case]

Originally Posted by phlange

Among the great GTD apps for iPhone that are currently giving people Alerts without claiming they are "impossible" <love that word:

Appigo's ToDo application (a GTD app costing $9.99)
Remember The Milk (free, albeit kind of crappy)
ReQall (Voice activated calendar-> free, with subscription to web site)

Countless others (including some $1 games) are currently utlizing these INTERNAL ALERTS without using any server of any kind.

Did I miss something? All of these are using servers to push the notification based on information of yours which they've stored on their servers (which, as I mentioned above, is the way we could provide this service as well):

• For Appigo ToDo, you sign up for their Alert Service.

• Remember the Milk for iPhone requires a $25/year Pro account web service.

• And if you want to receive push notifications from reQall for iPhone, they require that you sign up for a $2.99/month or $24.99/year reQall Pro account.

Of course, it's no surprise that they all have services, because the way push notifications work is that something has to push the notification at the appropriate time. Since the iPhone app can't push the notification (iPhone apps can't run in the background), that notification has to come from some other service somewhere!