The latest version of Apple's mobile operating system, iOS 5, is such a significant overhaul that users who install it today will feel like they have a new device, says Shane Richmond.
Among the 200 or so new features are some big changes, none bigger than the overhauled notifications system. The iPhone and its cousins the iPod touch and iPad have handled notifications poorly for a long time.
If a text message arrived while you were playing a game, for example, then it would interrupt everything and place a message in the middle of the screen. The game would not resume until you had dealt with the message. Alerts that arrived when your device was inactive caused a different problem: unlock the screen without thinking and the notifications would disappear, leaving you wondering which app required your attention.
iOS 5 sweeps all of that away with Notification Centre. Swipe down from the top of your screen and you'll see all of the notifications that require your attention. Weather reports, stock prices, calendar entries and more can all be stored there. Android users will rightly point out that Apple's implementation here is very similar to the way notifications work on Android.
However, as ever with Apple the important bits are the details, the 'fit and finish' of the feature, and it is these that make notifications a triumph. Whether it's the ability to 'unlock' a notification itself and go straight to the relevant app (instead of unlocking the screen and then opening the app) or the way that notifications subtly roll in at the top of the screen while you're doing something else, the implementation is excellent.