plain-English prompt → Type Notes installed and launched
Private beta · real development on Android
Your phone is
the build machine.
Blackwall puts the real Codex CLI and a verified Android toolchain on Android. Describe an app in ordinary language; it builds, signs, installs, and launches on the same device—without a Floof Logic build farm in the middle.
15:41
measured clean App Builder install → generated app launch
LOCAL BUILD
APK ready
installed on device
Real Codex CLI
Android SDK 35
Java 17
Debian + npm option
Measured, not imagined
The numbers are already real.
In clean acceptance trials, both Blackwall paths reached a generated, launched app in under 20 minutes. Once the toolchain was warm, prompt-to-installed was measured in minutes.
prompt → installed app, with the toolchain already ready
warm APK build stage; AI authoring is the longer part
Blackwall product checks passing in the final test suite
Dated acceptance measurements, not performance guarantees. The 6:24 physical result used Blackwall v5 on a Pixel 10 Pro; clean and warm trials used Blackwall v4 on API 36 ARM64 emulators. Results vary with phone, network, model workload, prompt, and approval speed. “Clean” includes first-run provisioning; “warm” starts with the toolchain ready.
One prompt. One phone.
Say it plainly.
Watch it become an app.
“I'd like a notes app, make it so that I can just type and save notes as text, and if I slide to the left I can see all of the different notes I have and go to them.”
01
Ask
Your idea can stay an idea.
No project scaffolding ceremony. Tell Codex what you want in ordinary language and keep talking while it works.
02
Build
Codex gets real tools.
It edits source, checks the icon and metadata, runs the local Android build, and hands the signed APK to Android’s installer.
03
Run
The result is a normal Android app.
Install it, launch it, use it. Type Notes requested zero permissions, saved text, exposed the notes list with a left swipe, and persisted it across relaunch.
Pick your starting line
A focused app builder.
Or the whole machine.
Blackwall has two first-run paths. Neither is a toy sandbox, and choosing the faster path does not close the door on the full environment later.
Fastest path
App Builder
From prompt to installed APK.
The local Codex experience plus the exact Android toolchain it needs, provisioned and checked for on-device app work.
- Real Codex CLI + Node
- OpenJDK / Java 17
- Android API 35 + build-tools 35.0.0
- On-device build, signing, install, and launch
15:41clean install → generated app launch
Complete environment
Full
A Debian development machine.
Everything in App Builder, plus the broader environment for people who want a real Linux/npm/Gradle stack in their pocket.
- Full Debian userland
- npm + Gradle 8.10.2
- Claude CLI, raw shell, SSH, and tmux workflows
- Install the dependencies your work actually needs
19:05clean install → generated app launch
Made for the device it runs on
Built for thumbs.
Backed by real PTYs.
Blackwall is not a desktop terminal squeezed into a small rectangle. The native shell makes long-running AI work feel at home on Android while the tools underneath stay real.
Speak the prompt.
Transcribe an idea, edit it in the composer, and send it into the same durable session.
Feels immediate.
Optimistic Send feedback appeared in 32–60ms across the two measured clean trials.
Direct when you want it.
A native GPU terminal sits over real PTYs, with chat-style input and direct terminal control one tap apart.
Walk away. Come back.
Durable tmux-backed work survives the screen, while notifications appear only when action is actually required.
The computer is right there
Not a remote build button wearing a terminal costume.
Blackwall is a real local development environment. Floof Logic does not sit between your prompt and your APK with a hosted build service, package mirror, credential proxy, or proprietary dependency gate.
01Your ideaplain language
→
02BlackwallCodex + real tools
→
03Your appinstalled locally
Codex and development tooling come from public sources or shipped artifacts—not a Floof Logic mirror.
Authenticate with the actual CLI providers and keep the development boundary on the device.
Use the low/no-dependency app defaults, or install more when your project genuinely calls for it.
“Local” means the project, toolchain, compilation, packaging, signing, and Android installation execute on the device. AI inference and public dependency downloads still use their upstream network services.
Private beta
What would you build
if the laptop were optional?
Blackwall already builds real Android apps on a real phone. We’re inviting a small group of people who want to push an on-device AI development environment much further.