Installing system apps on Android 4.4 I've installed apps on the system partition on Android 4.1 and it's as easy as moving an APK to the /system/app/ folder and restart the device. The PackageManager (I assume) will recognize a change in the directory and will install the application.

Now I'm trying to do the same thing on Android 4.4 and it's not working. I'm seeing the APK on the /system/app/ directory but I don't see the app on the launcher. I also tried moving it to the /system/priv-app/ folder but the end result is the same.

Does anyone have a clue of how to do this?

By the way, the 4.1 device was a Samsung Galaxy Tab 3 7" Wifi and the 4.4 device is a Samsung Galaxy Tab 4 7". Both are rooted.
When copy/move files to system you need to change permissions using chmod 644 file_name.apk. The apps will then show back up.