The user interface is stripped back. You won’t find the fluid animations, the Stories bar dominating the top of the screen, or the immersive video player of the main app. The interface is utilitarian—white background, blue headers, black text. It is reminiscent of Facebook’s mobile website from 2015.

Android 4.4.2, known as , utilizes API Level 19 . Facebook Lite is uniquely optimized for this environment:

If you try to install the standard Facebook app on KitKat, you will likely see an error saying "Parse Error" or "App not installed." This is because the standard app requires Android 5.0 (Lollipop) or higher.