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How to know who has tried to unlock your mobile with these apps

26 mayo, 2021

What happens to your phone when you don’t have it in front of you? With specific applications you can know it, well take a photo every time someone tries to unlock the phone. The idea is not so much to protect the mobile, but to find out later who tried to unlock it without your permission.

There are many applications to spy on who is trying to unlock the phone, but we have selected the five best for you. We also tell you the limitations of this type of apps, which work very well but are not foolproof.

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Before starting…

Before offering you a list of the best apps to hunt in photos to anyone who tries to unlock your mobile, it is necessary to take into account some limitations of this type of application. The first is that they only serve to failed login attempts using PIN, password, and pattern and not to biometric failures: that is, if they have put their finger on the fingerprint reader.

The second limitation is obvious: the mobile must be locked. That is, if the mobile is kept automatically unlocked because it is in a certain location, the intruder will be able to access all the content and the following applications will not even know that this has happened.

Another fact to keep in mind is that the following applications need administrator permission to monitor failed login attempts. The apps themselves guide you through the process, but you must bear in mind that you must deactivate this permission before you can uninstall them from your mobile.



Lockwatch is a simple application to control who unlocks your mobile without success. To install it you need grant you administrator permissions, but the good thing is that its operation is completely transparent: it does not warn of its presence at any time and it works perfectly with the normal unlocking of the mobile.

In this way, when someone enters the wrong PIN, the application notifies you by sending you an email where it is included the intruder’s photo, time and location. The premium version includes some additional functions.

Lockwarch - Catch Thieves

Lockwarch – Catch Thieves

Third Eye

Third Eye

Another alternative is Third Eye, which also needs administrator permissions to integrate within Android. From the settings you can choose from how many attempts you want to take the photo of the intruder and also save a record of all the latest unlocks of the mobile.

How to configure Android to protect your privacy as much as possible

The advantage of Third Eye is that it shows you the photos of the last unlock attempts from the mobile directly in the app, the next time you unlock the mobile. In the tab Photographic record you have a photo book of the intruders of your mobile.

Third Eye

Third Eye



CrookCatcher has a similar operation to the previous applications, although the interface is more careful and the configuration is done through a comfortable wizard at startup. With this app you can find out who is trying to unlock your mobile, both on the mobile itself and receiving email notifications.

The application works quite well, capturing the photo of anyone who enters the wrong PIN, pattern or password. From the settings you can change some related settings on how the app takes photos and include, or not, the location of each failed attempt.

CrookCatcher - Security

CrookCatcher – Security

Detect Intruder


Like the previous applications, you must give Detect Intruder administrator permission to supervise who tries to unlock your mobile. For this you can configure a limit of failed attempts before the intruder’s snapshot is taken.

You can receive the notifications with the photos in the app itself or by email, as well as optionally attach to each failed attempt location information. In the settings you can configure the automatic focus and the offset until the photo is taken.

Detect Intruder - Thief Caught

Detect Intruder – Thief Caught

Selfie to the intruder


Another similar option is Selfie to the intruder that, how could it be otherwise, requires activating the administrator permission. This app does not save the location of attempts, but in turn it has other exclusive functions such as the possibility of synchronizing photos with Google Drive to view them from other devices.

The app settings are quite complete, being able to choose a custom delay before the photo is taken and with the possibility of take a photo whenever the mobile is unlocked, even if the correct code is entered.

Intruder Selfie ™

Intruder Selfie ™