Neuropil

Android client for the open-source interactive atlas of the male Drosophila CNS (formerly Cerebra).

Download

• APK: app-debug.apk — 59.6 MB, debug build, signed with a debug keystore.

Note: This is a debug build (assembleDebug). On most Android 8+ devices you can install it directly by enabling “Install unknown apps” for your browser/file manager. Play Console release signing is not applied.

What is it?

An interactive, WebGL-powered 3D atlas of the 166,700 neurons of the adult male Drosophila melanogaster central nervous system, wrapped in a Capacitor shell for Android.

Features

• Explore 166,700 reconstructed neurons in WebGL2
• Search by neuron name / type
• Cinematic intro sequence
• Read the paper context and credits
• Dark ocular-themed UI, splash screen with the Neuropil wordmark
• Hardware-accelerated H.264 video decoding on device

Tech

Layer	Stack
App shell	Capacitor 6, Android (minSdk 24, target 36)
Front end	React 19, Vite 7, Three.js
Rendering	WebGL2, GPU-accelerated shaders
Genre	debug APK (com.cerebra.brain)

Build it yourself

cd web
npm install
npm run build
npx cap sync android
gradlew.bat assembleDebug   # requires JDK 21

APK output: web/android/app/build/outputs/apk/debug/app-debug.apk

Source

Full source lives on GitHub:

https://github.com/birwatkar123-collab/neuropil

Acknowledgements

• Original Cerebra author: Mukhsin0508