Users can lock apps with a 3×3 pattern, a fingerprint, or a PIN code, and if someone enters the wrong code three times, the app will snap a photo of them. Now, this app is fairly basic, but it should be enough if all you want to do is prevent your kids from accessing specific apps (there’s no way to protect individual files as yet). This service is completely free, with no ads, and runs on any device running Android 4.1 or newer. Enter Norton App Lock, a simple yet effect applock created by an immediately recognizable antivirus company. This is usually necessary for them to function properly, but it can still be a little uncomfortable if you don’t fully trust that the developers are legitimate. Privacy lock programs ask for a lot of permissions. Without further ado, here are the best privacy lock apps for Android: 1. Many of these applocks can’t even be uninstalled without the correct code, so there’s no easy way to circumvent the protection that they offer. These are known by many names but generally, you’ll see them called an applock, app locker, or privacy lock app (note that this is different from a vault, which tend to only protect image folders). So what’s the answer? Simply install an app capable of password protecting your apps and files. You could add a lock screen, but this doesn’t offer any protection if you share your device or if someone somehow gains access to your unlock code. For example, you might want to keep your conversations with friends private, stop anyone from checking your browser history, or restrict access to specific apps, photos, or folders. When you stop and think about it, there are all kinds of things you might not want others to see on your phone.

How to lock a folder on android