Lockwatch – Thief Catcher

In-app purchases
4.5
73.6K reviews
5M+
Downloads
Content rating
Everyone
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About this app

Lockwatch secretly takes a photo using your front camera when someone enters an incorrect unlock code on your phone. It then emails you a photo of the intruder along with their GPS location, without them knowing.

The app has helped recover hundreds of lost and stolen phones, and has been featured in TV and online news stories.

Lockwatch uses Android's built-in lock screen and runs only when an incorrect unlock attempt occurs, so it doesn’t drain your battery.

Note: You must enter at least four digits or dots for Lockwatch to trigger. If the correct code is entered within 10 seconds, Lockwatch will cancel the alert to avoid false alarms.

The app offers additional features, such as the ability to attach multiple photos and audio clips to the email, email notifications when a new SIM card is inserted or when the phone is turned on.

Lockwatch includes a free 7-day trial. After that, a subscription is required to continue using the app. You can cancel anytime before the trial ends.

For help, visit: https://bloketech.com/lockwatch/help

This app uses the Device Administrator permission to monitor screen unlock attempts.
Updated on
Dec 16, 2025

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
This app may collect these data types
App info and performance
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.5
71.9K reviews
A Google user
October 12, 2018
This app is really cool and is for sure worth downloading. It does exactly what it says it's going to do. I downloaded three similar apps at the same time as Lockwatch, all of them claiming to do the same thing. After testing all four apps i quickly deleted them all except Lockwatch. Lockwatch was the best in every category, beating out the competition. I've used it for a few weeks on my Galaxy S7 Edge and I have no plans on getting rid of it. I use it all the time!! Thanks!
282 people found this review helpful
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Matt Blattel
December 20, 2023
Given the one star rating due to the fact that I purchased a year subscription and within a week I'm already having multiple failed login notifications. Yes they have emailed me and yes they show location. What they don't show is a picture, simply a blank square. And there is absolutely no link for tech support, not even on the website.
52 people found this review helpful
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Meg Reed
July 23, 2022
I installed this, set up the email, set permissions, etc, then tested it to see if it would send an email of me trying to incorrectly unlock my phone. It didn't. But I thought maybe it needed some time to send the email. I tried a few more times, then went to bed. In the morning there were still no emails. I checked my spam folder and everything. Nothing. This app was completely useless to me.
210 people found this review helpful
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What’s new

Lockwatch now supports power on and device unlock alerts even while your device is in a locked-down direct boot state.