Whether you prefer the or a lightweight, data-saving option like Facebook Lite .

: Android 4.4.2 operates on API Level 19. Modern Facebook applications generally require a minimum of API Level 26 (Android 8.0) or higher to run. The underlying code of a modern app relies on system architectures that simply do not exist in KitKat.

Because you are installing this application outside of the official Google Play Store, you must complete a process called "sideloading." follow these steps carefully. Step 1: Enable Unknown Sources

Legacy operating systems lack modern cryptographic protocols (like TLS 1.3). Without updated security certificates, your phone cannot establish a secure connection to Facebook’s current authentication servers.

Meta officially ended core developer support for Android 4.4.2 several years ago. The Google Play Store will usually block you from downloading the current app, displaying the error message: "Your device isn't compatible with this version." Server-Side API Changes

Modern Facebook apps can easily take up hundreds of megabytes (or even gigabytes) of storage over time. Older APKs are often a fraction of that size.

Modern mobile apps rely heavily on modern hardware components and later Application Programming Interfaces (APIs). Devices built for Android 4.4.2 (API Level 19) fail to process these packages.