Independent directory
Every app built on QVAC.
QVAC is Tether's open-source platform for running AI on the device in front of you — no servers, no accounts, nothing sent anywhere. This is a running index of what has been built on it: the applications, the models, and the tooling underneath.
Applications
5 listedQV.AC
Tether Data
One assistant, infinite agents, zero servers.
iOS · Android · macOS · Windows · Linux
QVAC Health
Tether Data
Health data that never leaves the body it came from.
Android · iOS
Local Money
localhost/AI
Personal finance that never phones home.
iOS · Android
Local Notes
localhost/AI
A place to write where nothing is watching.
iOS · Android
Local Talk
localhost/AI
A chat assistant with no one on the other end.
iOS · Android
Built something?
The directory is open. Send a pull request with an entry for your app and it will be listed here alongside the rest.
Add an app →The coloured tags on each card are the QVAC capabilities that app relies on — llm for text generation, ocr for reading images, and so on. Each maps to a plugin in the SDK.
Writing
All writing →- What QVAC actually is Tether built an AI platform. The name is an acronym, the marketing is cosmic, and underneath it is a fairly specific piece of engineering. Here is the specific part.
- The case for local-first AI The argument is usually made about privacy. Privacy is the weakest version of it.
- Fine-tuning a model on your phone QVAC Fabric claims a billion-parameter fine-tune on a Galaxy S25 in eighty minutes. How that is possible, and what it changes.
- Delegated inference, or: your phone is not the boundary Every argument against on-device AI is really an argument about how small a phone is. QVAC's answer is to stop treating the phone as the edge.
Underneath
Plugin catalog
Every built-in capability the SDK ships, what each one enables, and the engine behind it.
9 plugins →Models and datasets
The open models, training corpora, and inference engine that the platform is assembled from.
3 entries →Build on QVAC
Where to start, what will catch you out, and what Tether is currently paying people to build.
Get started →