By “physical protection of data” we do not mean having a stronger SSD, a better case, or the use of a screen protector. We meant the protection of our info when someone physically gets our devices – for instance when we left our phone on the table at the office.

Using a pin-code for unlocking the screen is a very good step in preventing a funny colleague to grab or phone and read out our personal messages in public, but this kind of protection is clearly not enough in many cases. For example, when you teach your kids to unlock your phone so that they can play with their favorite games. Another instance is when you give your phone to a colleague and you need to have the device unlocked.

An app locker does not lock your device, but lock your applications – which means you can give your tablet to your kid to read an e-book on without being afraid he would share your private photo gallery on Facebook.

Hexlock App Locker&Photo Vault is one very good example for app protecting applications. This tiny little software has many useful functions besides locking your apps – such as parental control and protection of Wi-Fi settings.

Hexlock allows you to set a pin password or a pattern to protect your apps with. You can choose between different profiles – so you can easily accommodate your protection to the situation. For example, you can unlock your games to allow your kids to play, but keep your Facebook and WhatsApp in safe at the same time.

Hexlock also allows you to put your pictures and videos to a media vault – you do not have to worry when you give your tablet out to a colleague to take notes on a meeting, for instance. It also keeps wireless settings free – none can steel your passport or use your network unauthorized.

This application is recommended to be used in every kind of devices. Even though you might have quite a simple smartphone which you use only for formal chatting and communication, intrudes can make harm any time – for example by sending rude messages to the people on your contact list, or simply use your internet all your internet credits for surfing on the net.

However, locking applications have the best use when you wish to share your device with someone else. This happens more often than you think – sometimes each of us gives out an unlocked phone to show around pictures for example.

Although you might not have intimate data on your device – which we do not recommend either, but some simple things can make very big disturbance. You may not want your boss to see that you used messenger during your working hours – even though, you just told your flatmate to bring bread. Or you simply do not want to post a pic from your gallery accidentally on Facebook when you do not want to be active on the net.

Hexlock is quite a good app in keeping your system safe, since it is well designed, quick to use and has a lots of features to work with. But, of course, it has its limits. Some users says it might lock their morning alarm app – so it does not awake them on time. Another problem is that if you do not want to have the same password everywhere, you might lock yourself out of your apps and galleries, which might be annoying some times. Bigger problem is, that when the app is uninstalled, it also empties the media vault – so be suspicious before saying OK to remove the app. Of course, using this app with care would solve most of these problems – and saves you from something much worse.

Thinking of how much harm can be made by one bad post on a Facebook wall or one bad message to the wrong person, we would say Hexlock or another locking app is a must-have for many Android owners. A stable, yet quick and easy-to-set software will not be annoying to use once you’ve got is used to, but keeps you for having hard moments because of not being confident about your privacy.