: Expanding home screen capacity from 180 to 2,160 apps.
For developers, iOS 4 brought the first strict code-signing enforcement for third-party apps and introduced background task completion , local notifications , and accelerated 3D graphics via OpenGL ES 2.0 . ios 4 ipa archive
Apps like Doodle Jump , Angry Birds (original) , Tap Tap Revenge , Facebook for iPhone (pre-News Feed redesign) , Tweetie (later Twitter), and iMovie for iPhone . Many are no longer available on the App Store or have been rewritten beyond recognition. : Expanding home screen capacity from 180 to 2,160 apps
But today, finding working applications for that era feels like archaeology. The official App Store no longer supports iOS 4. Apple’s servers have long since stopped serving old binaries to legacy devices. If you have a vintage iPad 1st generation or an iPhone 3GS stuck on iOS 4.3.3, you are greeted with error messages like “Unable to Download App” or “This app is not compatible with this iPhone.” Many are no longer available on the App