Can I use Apple Push Notification Service to have my app do something without notifying user in iOS 7

Question

My Algorithm wishes to work this way-

If some desired event occurs at my server then I wish to send a small amount of data to every user my app (foreground or background

Answer 1

You can use the content-available key in the push notification data and application:didReceiveRemoteNotification:fetchCompletionHandler:. It could be considered a bit of a hack for your use case and if you try to use it too much you will get limited by Apples system.