Here is the full story regarding Navigation Bar APKs for Android 4.4.2 (KitKat).
Grant Accessibility Permissions: Once opened, the app will ask for "Accessibility Service" access. This allows the app to draw the buttons over your other apps. Pro-Tip: Improving Performance navigation bar apk for android 442 new
Because these older versions may not be the "current" ones on the Play Store, you will likely need to sideload the APK. Here is the full story regarding Navigation Bar
Works on most 4.4.2 devices (Samsung, HTC, Sony, Xiaomi, etc.) navigation bar apk for android 442 new
Android 4.4.2 devices typically feature 4.5 to 5.0-inch displays with resolutions ranging from 480x800 (WVGA) to 720x1280 (HD). Adding a 48dp navigation bar significantly reduces vertical screen space.