CrookCatcher — Anti theft app

Contains adsIn-app purchases
64.8K reviews
Content rating
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About this app

CrookCatcher is an app that takes a picture when someone tries to unlock your phone with the wrong PIN, password or pattern. It then secretly emails you the picture, the GPS location and estimated address of your phone. CrookCatcher helps thousands around the world protect their phones from thieves and unauthorized users.

🌐 Worldwide in use
With over 5 million downloads, CrookCatcher has helped countless people worldwide identifying thieves and recovering stolen phones.

🔒 Android's built-in lock screen protection
CrookCatcher utilises Android's built-in lock screen for a seamless and secure experience.

🔋 Battery
CrookCatcher is only active upon incorrect password, PIN, or pattern entries, remaining idle at other times to save battery 💤.

🥳 Essential Features (Free)
✅  Take picture
✅  Find phone GPS location
✅  Send alert emails with picture and location

⭐⭐ PRO Features ⭐⭐
✅  Take multiple pictures with both cameras
✅ Record sound clip
✅  Sound alarm
✅ Show custom message to thief on lock screen
✅  Show a fake home screen: if someone forces you to hand over your unlocked phone
✅ Take a picture when someone unlocks the phone successfully after previous failed attempts
✅ Postpone sending email if phone has no internet connection
✅ Change email subject: so a thief doesn't see revealing email notifications
✅ Lock the app with a pattern
✅ Disguise app: change CrookCatcher icon to a files icon.
✅ No ads

🔑 Device Administrator Permission
This app uses the Device Administrator permission to securely monitor unlock attempts.

Important Notes
- Due to Android security precautions, your phone must be unlocked once after reboot for CrookCatcher to access the camera.
- CrookCatcher does not support pop-up cameras or fingerprint errors.
- On android 13 and above, you will see a mandatory system notification when the camera is in use.

🛠 Help & Support
For more information please visit
For frequently asked questions, please visit
To learn how CrookCatcher respects your privacy, please visit

Protect your phone from theft and unauthorised access with CrookCatcher!
Updated on
Sep 17, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

64.5K reviews
M Johnson
December 1, 2022
This app used to work perfectly on my phone. After the August 2022 update it is not working properly. After 8-10 attempts I might get one picture of an intruder (set for 2 failed attempts) and sometimes no pictures at all. Defeats the whole purpose of the app. I have noticed that many negative reviews are after the update date. I wish I never updated or had kept an apk file for the older version. Some apk files won't install or work but it's not working now anyways. I have to uninstall.
118 people found this review helpful
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A Google user
October 30, 2019
I have the free version of this app and given my results i have not been convinced to purchase the full version, let alone keep the free version. After a few days of testing I have determined that this app works less than 10% of the time. I have intentionally and unintentionally entered the incorrect authentication and the app only responded a few times. I have changed the settings and configurations in order to hopefully get better results however it rarely works as advertised.
334 people found this review helpful
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Rajesh Kumar
September 4, 2023
My mobile is realme narzo 20 and I paid for the premium version but, so disappointed due to the following experiences:- The application is having some defects. It doesn't start automatically after a reboot/restart of the phone, hence all permissions are granted. The App becomes active only when the phone is unlocked after reboot/restart. This is a serious error in the build up of this app. Hence, the intruder can get through if it's stolen. At times I have to start the App in a manual way.
14 people found this review helpful
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September 9, 2023
Hello, you are right, this is a very serious issue. Android is in a special secure state before the first initial unlock, which is very hard to work with, but I am looking into it again at the moment, to see if it is possible to fix. Feel free to request a refund by sending an email to

What's new

- Added automatic image compression based on internet connection, so emails are less likely to fail due to slow internet.
- Layout and text improvements, bug fixes.
- CrookCatcher now asks to be put into the un-restricted battery optimization category to make sure it works in the background.