Apple decided to call this new member the iPhone Air, which makes sense since it's the first of its kind. iPhone Air is Apple's Thinnest SmartphoneJust like its name suggests, the iPhone Air comes as a very thin smartphone. It is worth noting that the iPhone Air is well built, not just to be thin, but also very strong. The company says the iPhone Air was built using 80% recycled titanium, the most in any iPhone ever made. Display and DesignThe iPhone Air features a 6.5-inch LTPO Super Retina OLED display with ProMotion 120Hz refresh rate.