IPhone OS 2 available to the iPhone and iPod Touch. Prior to the public release of iPhone OS 2.0, Apple held a keynote event to announce the iPhone OS Software Development Kit ("SDK") to developers. The most notable feature of iPhone OS 2 was the App Store. Before this feature was introduced, the only way to install custom applications on the device was via jailbreaking, which is strongly discouraged and unsupported by Apple. There were 500 applications available for download at the launch of the App Store, though this amount has grown dramatically since then. Now, the App Store has more than 2
People Power Company at Bitfone, which was acquired by Hewlett-Packard. People Power was initially envisioned as a greentech company with a focus on energy efficiency. In 2013, the company released its "Presence" app, which is designed to turn older smartphones and tablets into home monitoring devices and sensors using the device's built-in camera. The Presence app also allows users to monitor and control third-party internet-connected appliances and electrical usage in their homes. The app was originally available for iPad, iPhone, and iPod Touch devices. In mid-2013, the company's Chief Scientist, John Teeter, was selected as a Presidential Innovation Fellow and worked at the