 some apps in our phone which we don't want people to access. I am definitely not talking about any hidden apps but it could be Instagram, WhatsApp, image gallery or any personal document. So if you want to lock some of your personal apps, here is a quick solution. Just download app lock on your Android phone and simply set up a 4 digit pin you can choose pattern lock if you want. Now confirm your passcode. You can set up your email address as well in case you forget your lock code or pattern. And now from here you can easily lock any app. You just need to tap on the lock button next to the app. Wow, isn't it extremely simple? Now no one can access your personal stuff on your phone.