When we have important things in life that are like treasure to us, we keep it and it is very painful when it is lost or stolen. For mobile users who are looking for ways to keep photos, videos and other files that are confidential for us there is an answer to your problem. This will be the guard that will block everyone who wants to enter unauthorized. This application is called Security App Lock. You won't worry if someone suddenly opens your mobile phone because it is closed and only you can open it.