Question

Hello I would like to know if there is an equivalent to the android’s alarmManager so I can register my app to be waken every X seconds?

Answer 1

No. At least not directly Here’s the list of all kinds of multitasking that Apple supports from its’s What’s new page:

Multitasking

iOS 4 delivers seven new multitasking
services that allow your apps to
perform tasks in the background while
preserving battery life and
performance. These multitasking
services include:

• Background audio – Allows your app to play audio continuously. So
  customers can listen to your app while
  they surf the web, play games, and
  more.
• Voice over IP – Your VoIP apps can now be even better. Users can now
  receive VoIP calls and have
  conversations while using another app.
  Your users can even receive calls when
  their phones are locked in their
  pocket.
• Background location – Navigation apps can now continue to guide users
  who are listening to their iPods, or
  using other apps. iOS 4 also provides
  a new and battery-efficient way to
  monitor location when users move
  between cell towers. This is a great
  way for your social networking apps to
  keep track of users and their friends’
  locations.
• Push notifications – Receive alerts from your remote servers even when
  your app isn’t running.
• Local notifications – Your app can now alert users of scheduled events
  and alarms in the background, no
  servers required.
• Task finishing – If your app is in mid-task when your customer leaves it,
  the app can now keep running to finish
  the task.
• Fast app switching – All developers should take advantage of fast app
  switching, which allows users to leave
  your app and come right back to where
  they were when they left – no more
  having to reload the app.