iOS 12 brings Memoji which lets you create an Animoji of yourself. You can customise a cartoon character that will appear in your Animoji list and work just like the Animoji characters, following your facial movement. Here's how you make your own Memoji.
What do I need to create a Memoji?
You need to have iOS 12 (to be released in Spring 2018) and an iPhone X or another (yet to be released) iPhone with FaceID.
How do I create my own Memoji?
Open the Messages app, and then open an existing message or start a new one.
Click the Animoji app in the bar along the bottom of the Messages screen (the monkey icon).
Tap the + sign at the beginning of the list of Animoji.
You're now in the Memoji creation tool. The first option is to select your skin colour with the selectors and sliders on screen.
Then swipe through the different categories to further customize your Memoji avatar.
You can change your hairstyle, head shape, eyes, brows, nose and lips, ears, facial hair, eyewear, and headwear.
When you're satisfied with how your Memoji looks, tap Done in the upper-right corner.
You'll be back at the Animoji picker, but you'll see your own custom Memoji among them.
You can repeat this process to make additional Memoji with different looks.