For the best experience on , downloading the Facebook Lite APK is usually the superior choice. It offers the core social experience without overwhelming your device's older hardware.
Android 5.1 Lollipop was released in 2015. Over time, the may stop showing the latest version of Facebook for older devices because the hardware can no longer support the newest features. By downloading an APK (Android Package Kit) directly, you can manually install a version of the app that is compatible with your specific system architecture. Choosing the Right Version: Facebook vs. Facebook Lite apk facebook android 5.1