![]() Local notifications followed, so things like alarms could be created without requiring an internet relay. ![]() It wasn't until iOS 5 in 2011 that Apple added Notification Center and banners, which allowed alerts to both work and scale far more elegantly. ![]() With iOS 3 (iPhone OS 3.0) Apple debuted the Push Notification (APN) service with brought alerts to App Store apps, but allowed for only the same obtrusive, modal popups as the original system.
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