Onyx - Private AI Chat

Your AI, fully private. Onyx runs powerful AI right on your iPhone, even offline. No account, no cloud, nothing shared. Ask anything, in total privacy.

Meet Onyx, the private AI assistant that runs entirely on your iPhone.

Ask anything. Get instant answers. No account, no internet, nothing shared.

A REAL AI ASSISTANT, THE ONE YOU ALREADY KNOW

Ask questions, brainstorm ideas, write emails and messages, summarize long texts, translate languages, get explanations on any topic, fix your code, prepare for an interview, plan a trip. Onyx does everything you expect from a modern AI chat, with real conversations and follow-up questions.

100% PRIVATE, BY DESIGN

Every question and answer stays on your iPhone. Nothing is sent to our servers, and your data is never used. Not even we can see what you ask.

WORKS COMPLETELY OFFLINE

Download an AI model once and use it anywhere. On a flight, in the subway, abroad with no signal. Onyx keeps working when other AI apps stop.

HUNDREDS OF MODELS, ONE PERFECT FOR YOU

Llama, Qwen, Gemma, and many more models, all free. Onyx analyzes your iPhone and highlights the ones that will run best on it, so you get the most capable assistant without guessing.

FAST AND BEAUTIFUL

Answers appear in real time as the AI writes. Clean formatting, elegant design, smooth from start to finish.

No subscription. No data collection. Just you and a powerful AI that respects you.

Download Onyx and take back control of your AI.