hello
The iPhone 8 and iPhone X both support fast charging, which can be charged to 50% power in 30 minutes, but to achieve fast charging requires a matching fast charging plug and data cable.
According to Apple's official description, the use of fast charge requires an Apple USB-C power adapter (29W model A1540, 61W model A1718, 87W model A1719). However, the iPhone 8 and iPhone X are still accompanied by a 5V 1A power adapter and the original data cable, and the charging speed is the same as the previous generation of Apple mobile phones. So you want to feel the fast charge function that Android users have become accustomed to, you must buy a new power plug and USB-C to Lightning adapter cable.
Hope to help you, I wish you a happy life!