This program is a simple stress test tool for Android devices.

It offers the following features:

- Forces the CPU to perform unnecessary calculations to generate load
- Executes the process with a specified number of threads
- Runs in the background, allowing work to continue even when the app is closed
- Displays a solid black blank screen to prevent burn-in the display for devices that has OLED display
- Also perform the memory stress test

How to use:
On Android 13 and newer, When this app started at the first time, it will show a dialog requesting notification permission. This is required to the app can continue processing even when its window is not open.

In the "Threads:" input field, enter the number of threads to use.

In the "Duration (minute):" input field, enter the amount of time, in minutes, that the process should run.
If a number is entered, the process will run for that many minutes.
To run the process indefinitely, leave the field blank.

In the "Memory stress test (MiB:)" input field, enter a value in MiB if you want to perform a memory stress test.
The test repeatedly allocates the specified amount of memory, writes arbitrary data to it, and then frees it, thereby stressing the memory.

Press "Start" to begin processing. Once started, a notification will appear indicating that background work is in progress. Press "Stop" to halt processing.

Press "Show blank screen" to display a solid black screen and temporarily stop the screen from sleeping. This is useful when running long stress tests on OLED displays.

Click "About..." in the menu bar to view the app's version and license information.

Use cases:

- Battery refresh
If the battery level is not displayed correctly, fully charging to 100% and then discharging to 0% can recalibrate the measurement. This app helps consume battery during that process.

- Warming the phone
A device that has cooled down can suddenly shut down or freeze, making it unstable. Use this program in the winter to warm the device and stabilize its operation before it becomes unstable.

- Staying warm with the device
Do you have a device with the CPU such as the Snapdragon 810? It's perfect for keeping warm! Use this app on the device and keep it in your pocket to warm your hands.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid

• Version 1.6.3 (10) suggested Added on Jun 26, 2026

  This version requires Android 4.0 or newer.

  It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

  Permissions

  • run foreground service
    Allows the app to make use of foreground services.
  • run foreground service with the type "specialUse"
    Allows the app to make use of foreground services with the type "specialUse"
  • show notifications
    Allows the app to show notifications
  • prevent phone from sleeping
    Allows the app to prevent the phone from going to sleep.

  Download APK 164 KiB PGP Signature | Build Log

New in version 1.6.2
Removed unnecessary dependences. By changing the activity from AppCompatActivity to Activity and removing unnecessary dependencies, the app size is now only one-sixth.
• Version 1.6.2 (9) - Added on Jun 25, 2026

  This version requires Android 4.0 or newer.

  It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

  Permissions

  • run foreground service
    Allows the app to make use of foreground services.
  • run foreground service with the type "specialUse"
    Allows the app to make use of foreground services with the type "specialUse"
  • show notifications
    Allows the app to show notifications
  • prevent phone from sleeping
    Allows the app to prevent the phone from going to sleep.

  Download APK 164 KiB PGP Signature | Build Log

New in version 1.6.1
Added memory stress test feature

Bugfix:
- Fixed a bug that the Memory stress test's value is reset to the previous value even if the value is zero or empty after the service is stopped.
- Changed the memory stress test thread to stop as soon as possible after service stopped.
• Version 1.6.1 (8) - Added on Apr 10, 2026

  This version requires Android 4.1 or newer.

  It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

  Permissions

  • run foreground service
    Allows the app to make use of foreground services.
  • run foreground service with the type "specialUse"
    Allows the app to make use of foreground services with the type "specialUse"
  • show notifications
    Allows the app to show notifications
  • prevent phone from sleeping
    Allows the app to prevent the phone from going to sleep.
  • net.tlfoxhuman.droidstress.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

  Download APK 0.9 MiB PGP Signature | Build Log