Siri
Siri was originally released as a stand-alone application for the iOS operating system in February 2010, and at the time, the developers were also intending to release Siri for Android and BlackBerry devices. Two months later, Apple acquired Siri. On October 4, 2011, Apple introduced the iPhone 4S with a beta version of Siri. After the announcement, Apple removed the existing standalone Siri app from App Store. "TechCrunch" wrote that, despite the Siri app's support for iPhone 4, its removal from App Store might also have had a financial aspect for the company, in providing an incentive for customers to upgrade devices. Third-party developer Steven Troughton-Smith, however, managed to port Siri to iPhone 4, though without being able to communicate with Apple's servers. A few days later, Troughton-Smith, working with an anonymous person nicknamed "Chpwn", managed to fully hack Siri, enabling its full functionalities on iPhone 4 and iPod Touch devices. Additionally, developers were also able to successfully create and distribute legal ports of Siri to any device capable of running iOS 5, though a proxy server was required for Apple server interaction.
Over the years, Apple has expanded the line of officially supported products, including newer iPhone models, as well as iPad support in June 2012, iPod Touch support in September 2012, Apple TV support, and the stand-alone Siri Remote, in September 2015, Mac and AirPods support in September 2016, and HomePod support in February 2018.
Apple Inc.
At the Worldwide Developers Conference (WWDC) on June 7, 2010, Apple announced the redesigned iPhone 4. It featured a 960 × 640 display, the Apple A4 processor, a gyroscope for enhanced gaming, a 5MP camera with LED flash, front-facing VGA camera and FaceTime video calling. Shortly after its release, reception issues were discovered by consumers, due to the stainless steel band around the edge of the device, which also serves as the phone's cellular signal and Wi-Fi antenna. The issue was corrected by a "Bumper Case" distributed by Apple for free to all owners for a few months. In June 2011, Apple overtook Nokia to become the world's biggest smartphone maker by volume. On October 4, 2011, Apple unveiled the iPhone 4S, which was first released on October 14, 2011. It features the Apple A5 processor and Siri voice assistant technology, the latter of which Apple had acquired in 2010. It also features an updated 8MP camera with new optics. Apple began a new accessibility feature, Made for iPhone Hearing Aids with the iPhone 4S. Made for iPhone Hearing Aids feature Live Listen, it can help the user hear a conversation in a noisy room or hear someone speaking across the room. Apple sold 4million iPhone 4S phones in the first three days of availability.