According to the APNS Reference at Apple.com, an iOS device cannot receive notifications while it’s offline / not connection to 3G or WiFi or similar. Yesterday I found an application (Pillboxie) that claims to be able to notify users even though they’re offline. I quote:
“In order to use reminder technology that doesn’t requre a network connection, Pillboxie will only run on devices running iOS 4.0 or later.”
and
“No network connection required!”
Both quotes are copied from the App Description in the App Store.
I have not succeeded to find out how this works and whether it is as reliable as APNS. Does anyone know anything about the offline noficiation service mentioned in the quote above?
There are actually 2 types of notifications.
So the app you are reffering to might be using local notifications. Check docs for more