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About CrookCatcher - Anti Theft

Disaster scenario #1: What if your phone was stolen?

With CrookCatcher installed on your smartphone or tablet, you might have a chance at getting it back!

CrookCatcher hides behind your lockscreen and if someone tries to unlock your phone with the wrong code, it takes a picture of the person with the front facing camera.

CrookCatcher immediately emails the photo of the thief to you, along with your device’s current GPS location.

So whether your phone gets stolen or your coworker/partner/friend is simply too snoopy, with CrookCatcher you always know if you have an intruder!

FEATURES

• Takes photo with secret camera when someone tries to unlock your phone with the wrong code.

• Sends email with photo, GPS coordinates, accuracy, estimated street address, map and link to Google Device Manager with which you can track your device’s location 24/7.

• Works with password, pin code and pattern lock.

• Combined map and photo view to browse pictures inside the app.

• Of course it is completely silent and secret (turn off notifications in settings).

• No battery drain - CrookCatcher only runs when the wrong code is entered.

• Select number of unlock attempts before picture is taken

• Tweakable GPS settings (timeout and desired accuracy)

The app is free - for you. The app contains ads - for me (the developer). Without the ads I would not be able to eat or create CrookCatcher. Support development and get the full experience of CrookCatcher by purchasing PREMIUM inside the app.

PREMIUM FEATURES

• Detect SIM card change (send email with SIM and carrier info: subscriber id, operator name, SIM country and SIM serial number. This info might make it possible to get help from the SIM carrier to find your phone).

• Detect Break-in (If someone is caught by CrookCatcher but then manages to unlock the phone, CrookCatcher takes another picture)

• Retry Email (If your phone is offline when pictures are taken, postpone emails until back online)

• Change Email Subject (if you get notifications from your email app, this is useful to prevent the thief from finding out he’s been caught)

• Hide notifications of new pictures until phone is unlocked

• Alert Message (show a custom warning message on the lockscreen when CrookCatcher has caught the thief. For example, you can tell the thief to give back your phone or you show the picture to the police!)

• And of course, NO ADS

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HELP: http://jakobharteg.com/crookcatcher/help.html

Note: This app uses the Device Administrator permission to monitor screen unlock attempts.

Why is the Samsung Galaxy S5 not supported?
There is a bug in the Samsung Galaxy S5 firmware, which causes CrookCatcher to fail. Until Samsung sends out a fix, CrookCatcher will not support the Galaxy S5.

What’s new

Version 3.0.34 · Updated October 2, 2026

Bug fixes.

User reviews

Darapaneni chaithanya kumar
Darapaneni chaithanya kumar
Trusted app so far
shafiqur Rahman
shafiqur Rahman
This app is very useful. i used this app at all time to prevent my favorite phone from theft. i appreciate this app and i recommend to everyone to use this app for protect your favorite phone.
Thoti Sumasree
Thoti Sumasree
Good
Imran hossain
Imran hossain
This app is very useful.thanks to this apps. I support to everyone to use this apps for security your favorite phone. .
Imran Tabassum
Imran Tabassum
Good app
Sooraj Santhosh
Sooraj Santhosh
Perfectly working!

Frequently asked questions

What does CrookCatcher do?
CrookCatcher takes a picture of the person who tries to unlock your phone with the wrong code and sends it to you, along with your device's GPS location.
How does CrookCatcher work?
CrookCatcher hides behind your lockscreen and uses the front facing camera to take a picture of the person who enters the wrong code. It then sends the photo and GPS location to you via email.
What features does CrookCatcher have?
CrookCatcher takes a photo with a secret camera when someone enters the wrong code, sends an email with the photo and GPS coordinates, works with password/pin code/pattern lock, has a combined map and photo view, is silent and secret, and has no battery drain.
Are there any premium features available in CrookCatcher?
Yes, premium features include detecting SIM card changes, detecting break-ins, retrying email notifications, changing email subject, hiding notifications of new pictures, showing a custom warning message on the lockscreen, and no ads.
Why is the Samsung Galaxy S5 not supported by CrookCatcher?
There is a bug in the Samsung Galaxy S5 firmware that causes CrookCatcher to fail. Until Samsung releases a fix, CrookCatcher will not support the Galaxy S5.

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