Go to Settings > Security and check the box for Unknown Sources to allow installation of apps outside the Play Store.
. While modern versions of Nova Launcher require Android 5.0 or higher, legacy versions like Nova Launcher 5.5.4 Nova Launcher Prime Apk Android 4.4.4
: If you're looking for a highly customizable launcher for your Android device running Android 4.4.4, Nova Launcher Prime is definitely worth trying out. Go to Settings > Security and check the