An AI that knows you.
And stays yours.
A private AI companion that knows you. It remembers your life, runs entirely on your iPhone, and belongs to you alone. Offline. Private. Yours.
A companion that remembers.
Tell it about your day, your people, what you're working through — and it actually remembers, conversation after conversation. No re-explaining yourself.
A private place to think.
Talk through what’s on your mind, out loud, with no one listening. Your words never leave your phone — so you can be honest.
Yours, not the cloud's.
Everything TAU knows about you lives on your device, in a memory you can see and edit. Delete anything, anytime.
Cloud AI forgets you between chats — and sends everything you say to a server. Assistants answer questions but never build a real memory of you. Companion apps remember, but they're built to keep you hooked.
TAU remembers you like a companion, runs entirely on your device like almost nothing else does, and is built to be honest with you — never to maximize your screen time.
The AI lives on your phone.
A capable model runs fully on-device — no servers, no internet required.
It builds a memory of you.
As you talk, TAU quietly forms a private memory of what matters to you, stored locally.
You see and control everything.
Open the Memories screen anytime to read, edit, or delete what TAU knows. Nothing hidden.
Nothing leaves unless you choose.
Your conversations and memory stay on your device, by default, always.
Built to make you more capable — not more dependent.
TAU works for you, and only you.
Early looks at the app. The Memories screen — visible, editable, yours — is what makes TAU different.
The private companion, yours from day one. On-device, offline — with a limited memory.
The full TAU. Unlimited memory and the deepest version of your companion, for those who live in it.
Coming to iPhone 15 Pro and the iPhone 16 and 17 lineups — any iPhone with 8GB of memory.