Apple has released its iPhone Software Development Kit for iOS 4 to all iPhone developers. Previously available only to paid developers, the updated SDK allows all registered developers a chance to develop OS 4-compatible apps, although the $99 annual fee will still be required for on-device testing and submission to the App Store. Notably, at least some of the accompanying documentation make references to iPhone OS 4, which was officially renamed iOS 4 two weeks ago. TUAW notes that Apple is expected to rescind its prior NDA covering iOS 4 developers now that the SDK and software update are more widely available. The iPhone SDK 4 s available now as a free download for all registered iPhone developers from the iPhone Dev Center.
Charles Starrett
Charles Starrett was a senior editor at iLounge. He's been covering the iPod, iPhone, and iPad since their inception. He has written numerous articles and reviews, and his work has been featured in multiple publications.