IPhone OS 3

iPhone OS 3 (stylized as iPhone OS 3.0) is the third major release of the iOSmobile operating system developed by Apple Inc., succeeding iPhone OS 2. It was announced on March 17, 2009, and was released on June 17, 2009. It was succeeded by iOS 4 on June 21, 2010, dropping the "iPhone OS" naming convention.

iPhone OS 3 added a system-wide "cut, copy, and paste" feature, allowing users to move content more easily. It also introduced Spotlight, a search indexing feature designed to help users locate specific information on their device, such as contacts, email messages, or apps. The home screen was expanded to let users add up to 11 pages, showcasing a total of 180 apps. The Messages app received support for MMS, the Camera app received video recording support on the iPhone 3GS, and a new "Voice Memos" app let users record their voice. In-app purchase capability was added to third-party applications in the App Store as well. Apple also added the accessibility screen reader option VoiceOver to iOS devices with this release.

iPhone OS 3 is the last version of iOS that supports the first-generation iPhone and first-generation iPod Touch as its successor, iOS 4, drops support for both models.

iPhone OS 3.2 is the first iPhone OS version to support the first generation iPad.