Apple Push Notification Service
From Wikipedia, the free encyclopedia
The Apple Push Notification Service is a mobile service created by Apple Inc. that was released with iPhone OS 3.0 on the 17 June 2009. It uses push technology through a constantly-open IP connection to forward notifications from the servers of third party applications to the iPhone or iPod Touch; such notifications may include badges, sounds or custom text alerts.
Apple first announced the service on 9 June 2008 with a slated release for that September; however, as stated by Scott Forstall at the iPhone 3.0 preview event on 17 March 2009, the rollout was rolled back in September after a decision to restructure the APNS for scalability purposes due to the allegedly "overwhelming" response to the announcement of the APNS. At both events, Forstall stated that push notifications were a better means to maintain battery life than background processes (which are used for pull technology) as far as receiving notifications are concerned[1].
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