If you try to download Facebook from the Google Play Store on a KitKat device, you will likely see an error message stating that your device is no longer compatible. However, you can still access the social network by manually installing an Android Package (APK) file. Understanding the Risks of Older APKs
You can download it directly from Uptodown or APKMirror . 2. Finding a Compatible Legacy "Full" Facebook APK facebook apk file for android 442