iPhone OS 2, the second major release of Apple's iOS, was released on July 11, 2008. It was introduced at the Apple Worldwide Developers Conference on June 9, 2008, and brought significant new features including the introduction of the App Store for third-party applications. The update was available alongside the release of the iPhone 3G and also supported the first-generation iPhone and iPod Touch (with a paid upgrade for the iPod Touch). This release marked the official start of third-party apps availability on iOS devices.
