iPhone（/？ fo？ N / eye fohn) is a series of smart phones designed and sold by Apple Inc. They run Apple's iOS mobile operating system. The first iPhone was released on June 29, 2007; the latest iPhone model, iPhone 7, was unveiled at a special event on September 7, 2016.

The user interface is built around the multi touch screen of the device, including the virtual keyboard. The iPhone has Wi Fi and can connect to a cellular network. The iPhone can take videos (although not standard before the iPhone 3GS), take photos, play music, send and receive email, browse the web, send and receive SMS, follow GPS navigation, take notes, perform math calculations, and receive visual voice mail. Other features, such as video games, reference works and social networks, can be enabled by downloading mobile applications. As of January 2017, Apple's app store had more than 2.2 million apps available for iPhone and other IOS devices.

Apple has released 10 generations of iPhone models, each with one of the 10 major versions of the IOS operating system. The first iPhone was originally a GSM phone and set a design precedent, such as keeping button positions in all releases and screen sizes for the next four iterations. IPhone 3G has increased its support for 3G network, followed by 3GS, which has improved its hardware. Fourth, it has a metal chassis, higher display resolution and front camera, while 4S has improved hardware and voice assistant Siri. The iPhone 5 has a higher 4-inch display and Apple's new lightning interface. In 2013, Apple released the 5S, which has improved hardware and fingerprint readers, as well as a lower cost 5C, a version of the 5S, with a colored plastic shell rather than a metal shell. The second is the larger iPhone 6, which has 4.7 and 5.5 inch displays, respectively. The iPhone 6S was launched the following year with hardware upgrades and support for pressure sensitive touch input, as well as Se (with 6S hardware but smaller 5S size). In 2016, Apple introduced the iPhone 7 and 7 plus, which added water resistance, improved system and graphics performance, new rear dual camera settings on the plus model, and new color options, while removing the 3.5mm headphone jack phone from the previous model.

The iPhone's commercial success is due to reshaping the smartphone industry and helping apple become one of the world's most valuable publicly traded companies by 2011. The original iPhone was one of the first to feature a flat-panel format and a touch-screen interface. Almost all modern smartphones copy this design style.