Simple Control is famous for its "trigger" zones. Instead of a bar that stays on the screen permanently, you can swipe from the bottom or sides to reveal the navigation buttons. This is perfect for 4.4.2 users who want to maximize their limited screen real estate. 3. Ultimate Navigation Bar
Since Android 4.4.2 is old, many apps on the Google Play Store have updated to require Android 6.0, 7.0, or higher. This means you cannot download them directly from the Play Store on a KitKat device anymore.