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Remote lock for Android phones & tablets

All your devices. One code. Locked in seconds.

Lost your phone, left the tablet at school or want screens off at bedtime? Lock My Devices locks every Android device that shares your user code — from the app or right here on the website.

Lock my devices How it works
GET IT ON Google Play

One-time purchase · No subscription · No account · Android 7.0+

code for all your devices
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biometric data stored
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lock from any browser
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one-time payment, no subscription
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Lock My Devices app screenshot: Install and enter one code

Set up in 2 minutes

Three steps to protect every device

  1. 1

    Install and enter one code

    Install Lock My Devices on each phone and tablet. On the User Code screen type the same hard-to-guess code on all of them and tap Continue.

  2. 2

    Grant lock permission

    Tap Grant Device Administrator Permission. Android needs it so the app can turn the screen off and lock it — nothing more.

  3. 3

    Lock any time, from anywhere

    Tap Lock All Devices in the app, enter your code on this website, or schedule a lock for a date and time you choose.

Device not with you?

Lock it from this website — no app needed on this computer

Type the user code you entered in the app. We send a lock command to every device registered with that code, and their screens lock as soon as the command arrives.

  • Works from any phone, tablet or computer
  • Sent over an encrypted HTTPS connection
  • Your code is never stored by this website
Lock Your Android Devices With Your Code

Exactly as typed in the app — upper and lower case matter.

Features

Simple tools that keep your screens locked

Lock My Devices does one job and does it reliably: it locks your Android screens when you need them locked.

  • Lock all devices at once

    Every phone and tablet that shares your user code locks together with a single tap.

  • Lock from the web

    No device at hand? Enter your code on lockmydevices.quansystem.com from any browser.

  • Scheduled lock

    Pick a date and time; Android’s exact alarm locks the device right on schedule — even after a restart.

  • Biometric app access

    The app opens only after fingerprint, face or screen-lock verification on the device.

  • Instant push delivery

    Lock commands travel through Firebase Cloud Messaging, the same channel Android uses for notifications.

  • Minimal permissions

    Device admin is limited to “force lock”. The app cannot erase, read or change your data.

See all features

When it helps

Made for real-life moments

  • Lost or stolen phone

    Lock the screen first so nobody can open your messages, photos or apps while you search for it.

  • Bedtime for kids’ tablets

    Schedule a lock for 21:00 so tablets go dark on time without a discussion.

  • Focus time

    Lock your own phone for a meeting, exam or study session and remove the temptation.

  • Family & shared devices

    One code for the whole household: lock every device in the house with one action.

Lock My Devices app screenshot: Scheduled lock at an exact time
Lock My Devices app screenshot: Lock All Devices with one code

Privacy by design

Security without collecting your life

No account, no e-mail, no location tracking. The app only knows the code you choose and the technical details needed to reach your devices.

Privacy policy
  • Fingerprint and face data never leave your device — Android verifies them, not us.
  • No location, contacts, photos or messages are read.
  • The website does not store the code you type.
  • You can ask us to delete your device records at any time.

Guides

Practical device-security guides

Step-by-step help for lost phones, screen-time routines and choosing a strong code.

All guides

Lost or Stolen Android Phone? What to Do in the First Hour

Lost or stolen Android phone? Lock the screen first, locate it, change your Google and banking passwords, block the SIM and report it. A first-hour checklist.

4 min read Read

How to Lock an Android Phone Remotely (Step-by-Step Guide)

Lock your Android phone or tablet remotely in seconds: set up Lock My Devices, choose a user code and lock every device from the app or a web browser.

4 min read Read

Scheduled Screen Lock for Kids: Bedtime and Focus Time

Set a scheduled screen lock on your child's Android tablet for bedtime or homework. How to plan it, set it up in Lock My Devices and build a healthy routine.

4 min read Read

FAQ

Frequently asked questions

All questions

What is Lock My Devices?

Lock My Devices is an Android security app by QuanSystem. It locks the screens of all your Android phones and tablets that share the same user code — instantly from the app or website, or automatically at a scheduled time.

How do I lock my Android phone remotely?

Install Lock My Devices on the phone, save a user code and grant Device Administrator Permission. Later, tap Lock All Devices on another device with the same code, or enter the code on lockmydevices.quansystem.com. The phone locks as soon as the command arrives.

What is the user code?

It is a code you choose yourself on the app’s User Code screen. All devices saved with the same code form one group and lock together. There is no account or password besides this code.

How do I change my user code?

Open the app, edit the code on the User Code screen and tap Continue. Do the same on every device you want in the group so they all share the new code.

Why does the app need Device Administrator Permission?

Android only lets an app lock the screen if it is an active device administrator. Lock My Devices requests just one policy, “force lock”, so it cannot erase the device, change passwords or read your data.

What happens if the device is offline when I lock it?

Firebase Cloud Messaging holds the lock command and delivers it when the device reconnects to Wi-Fi or mobile data. Scheduled locks do not need the internet at all.

Protect your devices before you need to

Install Lock My Devices on every phone and tablet today — setup takes just two minutes.

GET IT ON Google Play Lock with code