Sovernity Ursa · for Mac and iPhone
Your own private AI. It lives on your Mac and gets to know you.
- Free
- No account
- Everything stays on your Mac
Mac with Apple silicon and 16 GB of memory · macOS 15 or later · about 7 GB model download
Sovernity Ursa for iPhone talks to your Mac. Coming soon to the App Store; until then, try the iPhone beta on TestFlight.
For adults 18+. May not be suitable for some minors.
An AI you can be honest with
Ursa is a personal AI for adults. Talk through a decision, think out loud about your week, or work out what you actually want. It runs entirely on your Mac, so you can be as open as you like.
Ursa is an AI, not a person or a therapist.
It isn't built for emergencies. If you're in danger, call or text 988, or call 911.
It learns who you are, and shows you what it learned
As you talk, Ursa picks up the facts of your life and how you think. When a reply uses what it knows, it says so: Used 3 things opens the exact lines it drew on, each linked to the chat it came from.
Everything it has learned is in one place, What I know about you. Read it, correct it, or erase it. Want to talk without it learning? Turn off learning for that chat.
Your iPhone talks to your Mac. Nothing in between.
Your Mac runs the AI and keeps everything. Ursa on iPhone is a window onto it: it sends what you type to your Mac over your own network and shows the reply. Your phone keeps only an encrypted draft of a message you haven't sent yet.
Your iPhone
Encrypted link on your network
Your Mac
Pair once with a QR code and three matching words. The connection is encrypted, and no server is involved.
Use your own Tailscale to reach your Mac from anywhere. Tailscale can see that your devices exist, never what they say.
What leaves your Mac
| When | Where it goes | What they see |
|---|---|---|
| Once, at setup | The AI model download from Hugging Face (about 7 GB) | Your IP address, as with any download |
| When your iPhone is paired | Your own iPhone, over your network or your Tailscale | Only your devices |
| Everything else | Nowhere | — |
On your Mac, everything is stored encrypted, with a key kept in your Mac's Keychain.
Why it's true
The Ursa app itself has no permission to use the network. Two small helpers do, each with one job. One downloads the model from fixed, checked addresses and verifies every file. The other listens for your paired iPhone and nothing else. After setup, Ursa never goes online.
Check it yourself
Watch Ursa with a network monitor like Little Snitch or LuLu. You'll see the model download, then nothing.
If you use your iPhone keyboard's dictation, that is Apple's feature, and Apple may process the audio to turn it into text.
If things get hard
Ursa checks each message for signs of a crisis, on your Mac. If it sees them, it doesn't write its own reply. It shows a fixed message with ways to reach people who can help: call or text 988, or call 911. Ursa isn't a crisis service. It can't contact anyone for you, and it can miss things.
Help in a crisis is also in Ursa's settings on iPhone, and it works even when your Mac is off.
How the crisis protocol worksUrsa is free
There are no accounts, no ads and no data to sell, because nothing is collected. Ursa runs on your Mac, so there are no servers to pay for. It's a showcase of what a private AI can be, made by one person who wanted one.
About SovernityQuestions
Does it work offline?
Yes. After the one-time model download, Ursa works without the internet. Your iPhone needs to reach your Mac over your network, or over your Tailscale when you're away.
What does it need?
A Mac with Apple silicon and 16 GB of memory or more, running macOS 15 or later, and about 9.1 GB of free space for the model download. The iPhone app needs iOS 26 or later and a Mac running Ursa.
How does the iPhone connect?
Open Ursa on your Mac, show the pairing code, and scan it with your iPhone. Check that both show the same three words, then confirm on your Mac. Your iPhone asks for permission to use your local network. Ursa needs it to find your Mac.
Where is my data, and how do I delete it?
On your Mac, encrypted. Delete any fact or chat in the app, or delete everything from Settings. Deleting a chat removes the chat and the facts learned only from it. What Ursa understands more broadly is in What I know about you, where you can change or remove it.
Is my data used to train anything?
No. Nothing you say leaves your Mac, so there is nothing to train on.
Why is it free?
Ursa runs on your Mac, so there are no servers to pay for. It's a showcase, made by one person.
How do updates work?
Download the new version from this page and replace the app. Your data stays where it is.
Is Ursa a replacement for professional help?
No. Ursa is an AI, not a person or a therapist. It can help you think things through, but it isn't medical or mental health care, and it isn't a crisis service or meant for emergencies. If you're struggling, please talk to someone you trust or a professional. If you're in crisis, call or text 988.
Download Sovernity Ursa
Version 1.0.0October 8, 2026Release notes →
Download for Mac (19 MB DMG)macOS asks you to confirm the first time you open it.
For adults 18+. May not be suitable for some minors.
Sovernity Ursa for iPhone talks to your Mac. Coming soon to the App Store; until then, try the iPhone beta on TestFlight.
SHA-256
f53cd5a98b412c1cce09e8b1df51b3603cc161578893130e1986f9b3b24f87b3
Verify (optional)
spctl -a -vv -t install "Sovernity-Ursa-1.0.0.dmg"should report “accepted” and “Notarized Developer ID”.
Requirements
- Mac with Apple silicon (M1 or later) and 16 GB of memory or more
- macOS 15 or later
- About 7 GB for the model, downloaded once at setup
- iPhone app: iOS 26 or later, and a Mac running Ursa