The key feature of the iPhone 6 as compared to previous iPhone models is size. The screen is larger, and the unit as a whole is thinner than previous models.
The standard iPhone 6 has a 4.7 inch screen with a resolution of 1334 x 750, and the Plus model has a 5.5 inch screen with a resolution of 1920 x 1080. The standard model is 6.9 millimeters thick, while the Plus is 7.1 millimeters.
Both phone models run on 64-bit architecture with Apple's A8 chip and M8 motion processor. Battery life is also improved as compared to the iPhone 5.
The iSight camera in each model runs in 1080p HD at 60 frames per second. Slow motion is at 240 frames per second, and there is a time-lapse video mode.
Touch ID security allows phone owners to use their fingerprints to unlock the phone, as well as approve purchases from Apple virtual shops. Users can also use the phone as a virtual wallet by adding a credit card to Passbook. Use of the fingerprint to unlock the phone and approve purchases is optional.
The phone also comes with iOS 8, which was Apple's newest iteration of iOS at the time of the phone's release.