Preflight · Early access

bRRAIn Labs. The apps, before they land.

These are pre-release builds you can try right now. They move fast, they may have rough edges, and your feedback shapes what ships. Get on the inside of the runway — download the latest bRRAIn mobile build and tell us what to fix.

Browse preflight apps ↓ Send feedback
In preflight

Apps on the runway.

Live early-access builds plus what's taxiing next. The mobile build always points at the latest published APK — no waiting on a release announcement.

Preflight

bRRAIn Mobile — Cortex

Android · Web App

A beautiful, futuristic AI knowledge workstation for your bRRAIn. Talk or type to an AI grounded in your own memory, take notes by keyboard or hand, browse every file, plan your day from live tasks and risks, and build lists and reports — light or dark, in the highlight color you choose. New in 2.2.0: Meetings — capture any conversation, get a live transcript and an AI-enhanced note filed straight to your vault, with action items flowing to your Next Steps and a pre-meeting brief ready before you walk in. Transcription runs on-device and is never stored.

Latest build Android APK
Download APK Open the web app →

How to install: Enable install from unknown sources, then open the downloaded APK — or tap “Open the web app” and add it to your home screen. Sign in with your bRRAIn account.

Preflight

bRRAIn for iOS

iOS · PWA

Install the Cortex web app to your home screen on iPhone and iPad — full capture, notes, planning, and AI recall — while the native build is in the lab.

Open the web app →

How to install: Open in Safari, then Share → Add to Home Screen. Sign in with your bRRAIn account.

Desktop · Windows · Linux

bRRAIn Desktop.

A calm, keyboard-fast knowledge workstation. Ask your bRRAIn as a real agent that finds, opens, reads, and acts on any vault document — side-by-side with the conversation. Self-updating, native on your machine.

Download bRRAIn Desktop

Pick your platform. Pre-release builds that verify their own updates, so once installed you'll always be current. macOS is on the way.

Detecting your platform…

Windows64-bit · installer LinuxAppImage · portable Linux.deb · Debian / Ubuntu
Prefer not to install? Run bRRAIn Desktop in your browser → Sign in with your bRRAIn account — same canvas workspace, nothing to download.
v2.20.3 Release notes → Verify integrity against the published SHA-256 checksums.
Getting started

Three steps to fly.

Preflight builds install side-by-side with anything from the store. Nothing here touches your production data unless you sign in.

Step 1

Download the build

Tap Download APK above. The link always serves the latest published bRRAIn mobile build.

Step 2

Allow the install

Android asks for permission to install from your browser the first time. Allow it, then open the APK.

Step 3

Sign in & explore

Use your bRRAIn account to capture, search, and chat with your bRRAIn. Hit a snag? Send us preflight feedback.

Your feedback shapes what lands.

Preflight is a two-way runway. Tell us what's working, what's broken, and what you wish it did — early testers steer the roadmap.

Send preflight feedback Sign in