Imagine it. Create it. Interact with it.

Generate interactive 3D holograms with your voice. Explore them with your hands. Arrange holograms and panels around your room in mixed reality. Describe anything and Willis designs it in about a minute, every part named, so you can take it apart and ask about any piece.

Opening soon. Try it free: 3 custom holograms and 5 voice minutes, no card.

Describe anything, out loud or by typing, and Willis builds it in 3D with every part named.
Take it apart on a phone or computer. On a Meta Quest, pull a part out and hold it in your hand.
An assistant for your day too: your schedule and answers in the same place. Nothing to install.

Live 3D

Inline-4 Car EngineExplode it to see every part

Drag to turn it. Tap a piece to name it.

Loading the hologram…

Here's an inline-four engine. Drag to turn it, explode it, or ask me where a part is.

This demo shows models, takes them apart, names parts and shares facts.

Not another chatbot

Other assistants tell you. Willis shows you, then hands you the parts.

Most appsWillis
Most appsMost assistants answer in text and pictures. WillisShows you a 3D model you can turn, take apart and ask about.
Most appsMost 3D tools start from a library or a file you supply. WillisBuilds whatever you describe in about a minute, every part named.
Most appsMost assistants stay on a flat screen. WillisPuts it on your table in HOLO MODE on a Meta Quest. Pull out any part and hold it on its own.
Most appsMost assistants can tell you how something works but can't hand it to you. WillisBuilds the hologram, then answers your questions about it. It keeps your schedule too, in the same place.

Whatever you work on, see it in 3D

Ask about the thing you're working on and Willis puts it in front of you, then answers about any part. Pick a day.

You

Show me a 200-amp panel. Where does the main bonding jumper go?

Willis

Here's a 200 A panel. The bonding jumper ties the neutral bar to ground, in the main panel only. It's the lit piece.

On screen

The breaker panel, taken apart, with the bonding jumper glowing.

What Willis can do

Type to Willis on every plan, and talk out loud with WillisHUD Max. Everything in this list is part of launch; what comes after is further down.

Coming next

Already planned and in the build queue, in no particular order.

Your inbox, watchedWillis reads the email you share with it and tells you what needs you: bills, deadlines, replies you owe.
What am I looking at?Point your phone's camera at something and ask about it.
Watch it get builtCustom holograms assemble piece by piece while Willis designs them.
An app on your home screenInstall WillisHUD and get a notification when something's ready.
Briefings that come to youA morning rundown and reminders by notification or text, without opening the app.
Google Calendar and clashesSign in with Google. Willis spots double-bookings and moves an event only after you say yes.
Directions in 3DYour route on a map hologram, with the time you need to leave.
Run the mathEquations solved and checked, every permutation, results as 3D plots.
Memory you can seeA page of what Willis remembers about you, which you can edit or clear.
Floor plans you can walkUpload a floor plan and walk through it in your room.
More anatomyThe brain, skull, kidney, lungs and liver, each reviewed like the heart.
Your Willis, your wayPick the voice, the name it answers to and the color of the orb.

How it works

1
Open WillisHUD
On Meta Quest, open it in the browser and tap HOLO MODE. On a phone or computer, any modern browser works.
2
Ask for something
Type what you want to see or understand. With WillisHUD Max, just say it.
3
Take it apart
Turn it, explode it, and ask about any part of it. On a Quest, pull a piece out with your hand.

Where it runs

Meta Quest 3 and 3S

HOLO MODE puts Willis and your holograms in your room through passthrough. Use your hands or the controllers.

Phones

iPhone or Android, in Safari or Chrome. Turn models with a finger.

Computers

Any modern browser on Mac or Windows. Drag to turn models, then type or talk.

Plans

Planned launch pricing; it can still change. Try it free first: every new account gets 3 custom holograms and 5 voice minutes, once, with no card. Built-in holograms are unlimited on every plan, custom designs come with a monthly allowance, and voice comes with Max or from your prepaid balance.

WillisHUD

$25a month

Billed monthly

Chat, holograms and your day. Add voice any time.

Get Early Access

Chat with Willis, unlimited (fair use)
150 custom designs a month
Unlimited built-in holograms
HOLO MODE on Meta Quest, plus phone and computer
Your calendar from a feed link
Voice from your balance: $0.10 a minute

WillisHUD Max

$100a month

Billed monthly

Talk to Willis out loud: about 33 minutes a day.

Get Early Access

1,000 voice minutes a month (about 33 a day)
300 custom designs a month
Everything in WillisHUD

Which plan fits you?

Talking with Willis on a typical day 0 min

Typing doesn't count toward voice minutes.

New custom holograms in a week 10

Built-in models like the heart, DNA and atoms never count.

Typing only, and about 43 custom designs a month.

WillisHUD: $25 a month

Voice minutesTyping only

Custom designs43 of 150

WillisHUD Max would be $100 a month.

Compare plans
Feature	WillisHUD	WillisHUD Max
Monthly price	$25	$100
Chat with Willis	Unlimited (fair use)	Unlimited (fair use)
Voice conversation	$0.10 a minute from your balance	1,000 minutes a month
Custom designs	150 a month	300 a month
Built-in holograms	Unlimited	Unlimited
HOLO MODE on Meta Quest 3 and 3S	Included	Included
Phone and computer	Included	Included
Captions on every spoken reply	Included	Included
Calendar from a feed link	Included	Included
In any 5 hours	Up to 25 custom designs	Up to 50 custom designs and 120 voice minutes
Each week	N/A	Up to 75 custom designs and 250 voice minutes
At a limit	Typing and built-ins keep working	Typing and built-ins keep working
Prepaid balance	Never expires	Never expires
Export or delete your data	Included	Included

Prices in US dollars. Sales tax may apply where you live. Cancel any time from your account; you keep access until the end of the period you paid for.

Your data stays yours

WillisHUD is built so nobody can see anyone else's data, and you can take yours with you or delete it at any time.

Today the site stores only waitlist emails, and Cloudflare counts visits without cookies. Read the privacy policy.

Walled off: Your data is reachable only through your own signed-in session, and automated tests check that one account can never read another's.
Sign in without a password: You get a one-time link by email. Sign-in links and sessions are stored only as scrambled hashes.
Secrets sealed: Calendar links and other secrets are encrypted with AES-256 and tied to your account.
Export or delete: Download your data or delete your account at any time.
No ads, no selling: We don't sell your data and we don't show ads. When accounts open, one cookie keeps you signed in; this site sets none.
Learning, not diagnosis: WillisHUD is for learning and curiosity, not medical advice. Don't use it to diagnose or treat anyone. It's an AI, and it says so.

Why it's called Willis

The Circle of Willis is a ring of arteries at the base of the brain. It joins the brain's front and back blood supplies, so blood has more than one way in. It's in the demo above, with blood moving the way it does in life. WillisHUD is Willis plus the HUD: the heads-up display your holograms live in.

Questions

Search questions

Do I need a VR headset?

No. On a phone or computer you can turn, explode and explore every model on screen. A Meta Quest adds HOLO MODE, where the holograms float in your room and you handle them with your hands.

Which headsets work?

Meta Quest 3 and Quest 3S, in the headset's built-in browser. HOLO MODE uses passthrough, so you see your room and the holograms together.

What's a custom design?

Anything that isn't built in. Describe it and Willis designs a 3D model of it in about a minute, and it appears the moment it's done. Built-in models never count toward your allowance, and designs you make are saved to your account.

What counts as a voice minute?

Time spent in a live voice conversation with Willis. Typing never uses voice minutes. Voice comes with WillisHUD Max (1,000 minutes a month); on WillisHUD, voice comes from your prepaid balance at $0.10 a minute.

What does fair use mean for chat?

Chat has no monthly cap for normal use. If an account sends far more than a person could, like an automated script, we slow it down and tell you why.

What happens when I reach a limit?

Willis gives you a heads-up at 80%. At the limit, typing and built-in holograms keep working, and voice and new designs wait for the limit to reset: a 5-hour limit frees up as your earlier use ages out, and the monthly ones reset on your renewal date. Or keep going from your prepaid balance, if you say yes.

Are there short-term limits?

Yes, like most AI products, so Willis stays fast for everyone. In any 5 hours, WillisHUD includes up to 25 custom designs, and Max up to 50 designs and 120 voice minutes. Max is also paced at 250 voice minutes and 75 designs a week. Your prepaid balance can carry you past any of them.

Does my balance expire?

No. It never expires, and Willis only uses it past your plan's limits after you say yes, either each time or as a standing setting you can turn off.

When can I use it?

WillisHUD is opening soon. The live demo on this page works today. Get early access and you'll get one email the day it opens.

Can I try it free?

Yes. When WillisHUD opens, every new account gets 3 custom holograms and 5 voice minutes free, once, with no card. Built-in holograms are always free.

How accurate are custom holograms?

They're designed by AI, so they can contain mistakes: a part out of place, a count that's off, proportions that are close but not exact. Built-in models are checked by reviewers before launch; custom designs aren't checked by a person. Use them to learn and explore, not as engineering plans or a medical reference.

What happens to my email?

It's used for one thing: telling you when WillisHUD opens. It's never sold or shared for anyone's marketing, and you can ask us to delete it any time. The privacy policy has the details.

Can I cancel any time?

Yes, from your account. You keep access until the end of the period you've paid for.

Do I have to install anything?

No. WillisHUD runs in the browser on a Meta Quest, a phone or a computer.

Where does the anatomy come from?

The heart is adapted from BodyParts3D, a research anatomy dataset from the Database Center for Life Science, used under CC BY 4.0: 57 structures from the dataset, ventricular walls modeled from its cavities, and a conduction system placed by our anatomy reviewers. The heart was checked by two independent anatomy reviews, and every built-in anatomy model gets the same before launch. Custom designs are AI-generated and can contain mistakes.

Is Willis medical advice?

No. Willis is for learning, not medical advice. Don't use it to diagnose or treat anyone.

What happens to my data?

Your account's data is walled off from everyone else's. You can download your data or delete your account at any time. We don't sell data or show ads.

Is Willis a person?

No. Willis is an AI assistant, and it says so.

Be first when WillisHUD opens

Try it free with 3 custom holograms and 5 voice minutes, then plans from $25 a month.

Imagine it. Create it. Interact with it.

Not another chatbot

Whatever you work on, see it in 3D

What Willis can do

Coming next

How it works

Open WillisHUD

Ask for something

Take it apart

Where it runs

Plans

Which plan fits you?

Your data stays yours

Why it's called Willis

Questions

Be first when WillisHUD opens