IPhone X series

iPhone X Series (pronounced "iPhone Ten Series") was a series of iPhones released by Apple Inc. from 2017 to 2018.

iPhone X
iPhone X was a smartphone announced on September 12, 2017 alongside the iPhone 8 and 8 Plus at the Steve Jobs Theater in the Apple Park campus. It was released on November 3, 2017 with a starting price of $999.

iPhone X R
The iPhone X R  was a smartphone announced on September 12, 2018 alongside the iPhone X S and X S Max. The device served as an upmarket successor to the iPhone SE (1st generation), and precedes the iPhone 11. The phone was released on October 26th, 2018 and came in 6 different colors--Yellow, Blue, White, Coral, Black, and a special (PRODUCT) Red edition.

iPhone X S
iPhone X S  was a smartphone announced on September 12, 2018 alongside the iPhone X R. The device served as the successor to the iPhone X, and precedes the iPhone 11 Pro. The phone was released on September 12th, 2018.

iPhone X S Max
iPhone X S Max was the plus-sized model of the iPhone X S, with a larger 6.2" display, compared to the 5.65" display on the smaller model, and a larger 3,174mAh capacity battery, compared to the 2,659mAh battery on the smaller model. The phone started at $1099, $100 costlier that the $999 iPhone X S.