Once you open the camera, you'll find Facebook's other new Snapchat-like features, including filters that can be added to images.

Other effects, such as animations and other interactive filters, are a new twist to dressed-up photos.

Also new is a "stories" tool that lets you post photos and videos that stay live for 24 hours. This feature is already available on Messenger and Instagram, which is owned by Facebook.

Snapchat pioneered camera-first sharing and is wildly popular with younger users. Years ago, Facebook tried to buy the company but was rebuffed. Since then, it has been trying, with varying degrees of success, to clone Snapchat's most popular features.

It might be working: Snapchat's growth rate has slowed down since Instagram introduced its own "stories" feature.