Last year, my roommate told me about an app called Bitmoji that lets you personalize a set of emoji to resemble yourself. Bitmoji, and the company behind it — Bitstrips — has grown in popularity.

Snap on Tuesday added a new feature to Bitmoji called "Bitmoji Deluxe." Bitmoji are customizable avatars that you can add to your Snaps or use outside of the app — you can add them to messages or use ...