hirnfrei architecture: local model, skill router, and your apps

Personal assistant for Android, Linux & Windows

Just say it,
hirnfrei gets it done.

A fully private assistant that lives on your device. Speak or type what you need. It picks the right fully isolated local skill and handles it. No cloud, no tracking, no nonsense.

how it works

Four steps, zero setup headache.

Download a model, integrate your local data and skills, ask something, approve the action, done. Nothing ever leaves your device.

01
Model selection showing on-device and LM Studio models

Download & connect models

Pick an on-device model or connect your desktop via LM Studio or any Ollama-compatible endpoint over VPN. No account, no subscription.

03
Skills management sheet with Calculator, Inbox and Todo List

Set up data & manage skills

Grant or revoke access to your apps and data like calendar, tasks, mail... Browse and configure skills, or import your own with a custom UI.

02
Voice and text input delegating a task

Delegate by voice or text

Speak or type what you need. hirnfrei reasons over your local data and skillset. Review every action before it runs, no magic in the background.

04
Custom Todo List skill interface that opens after approval

Skills with their own UI and logic

Each skill ships a custom HTML interface and connects to your data over local web channels, bidirectionally.

for developers

Build your own skills.
Ship nothing to the cloud.

Write a skill, plug it into hirnfrei's ecosystem, and forget about everything else. No servers, no deployment pipelines, no cloud bills.

Zero infrastructure

No servers to run

Skills run on the user's device. No backend to operate, no database to secure, no rate limits to manage.

Custom interface

Your own UI

Ship a full HTML and JS interface that opens inside hirnfrei using a bidirectional, real-time, fully offline SDK

Ecosystem

Plug in, not build out

Focus on what your skill actually does. Deployment, security, and data infrastructure are not a worry.

Everything stays on the device. No personalized telemetry, no data collection, no exceptions. Your data never leaves your devices — not now, not ever.

Early access

Be the first to use hirnfrei.

We're building in public. Join the waitlist to get early access, share feedback, and shape what hirnfrei becomes.