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PlugBrain

PlugBrain blocks apps and uses math challenges to reduce screen time.
PlugBrain is an app that encourages regular breaks from distracting apps by blocking access at scheduled intervals.
To regain access, you’ll need to solve a math challenge that adjusts in difficulty: the more frequently you use the apps, the harder the challenges become, but the longer you stay away, the easier they get.

**Features**

- No ads
- No internet required
- Blocks distracting apps
- Unblock apps by solving math challenges
- Difficulty increases with frequent use, decreases with focus

**How to use**

- Grant all required permissions
- Select distracting apps
- Choose your focus interval
- Stay focused ;)
  • app screenshot
  • app screenshot
  • app screenshot

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.

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  • Version 1.3 (13) suggested Added on Jul 28, 2025

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 9.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • android.permission.PACKAGE_USAGE_STATS
    • query all packages
      Allows an app to see all installed packages.
    • ask to ignore battery optimizations
      Allows an app to ask for permission to ignore battery optimizations for that app.
    • This app can appear on top of other apps
      This app can appear on top of other apps or other parts of the screen. This may interfere with normal app usage and change the way that other apps appear.
    • app.plugbrain.android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 3.3 MiB PGP Signature | Build Log

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