PlugBrain

PlugBrain is an open-source Android application for managing access to distracting apps. It is intended for users who want to add a deliberate step before returning to selected apps. The app combines app-use control with short math-based exercises.

Before using it, users grant the required permissions, choose which apps should be restricted, and set a focus interval. When access to a selected app is blocked, PlugBrain allows it to be restored after the user solves a math challenge. This creates a pause between the choice to open an app and immediate access to it.

The challenge difficulty responds to the user’s pattern of access to the selected apps. More frequent attempts to use those apps result in harder challenges, while longer periods away result in easier ones. PlugBrain contains no ads and can work without an internet connection.

PlugBrain is listed in the Health & Fitness category for Android, where its focus is app-use control and intentional device habits. Its open-source license forms part of the product’s stated software and distribution model. MirrorNest mirrors the official Android build directly on its own storage and scans it for malware before publishing it.