Now Available Mac app and iPhone preview

Zero is a personal assistant with a small team of helpers called Zips. Give Zero a task, and the right Zip gets it done and comes back with the finished work.

iPhone preview through TestFlight. Mac app, signed by Apple.

Demo: you ask Zero to email Jordan about the lease. Zero hands the job to a Zip called Home, which writes the email and shows you a card with a Send button. After you tap Send, Home confirms the email went out.

Free to Run and Open Source

Run Zero on your own Mac or home computer with the ChatGPT or Claude plan you already have, and read every line of its code. Hosted plans, for people who would rather not run anything, open later.

Message Zero Like a Teammate

Ask in plain words, the way you would ask a friend who is good with details. Zero keeps track of what every Zip is doing, so you only ever talk to one place.

  • Remembers what you tell it. Zero keeps the details you mention and brings them up when they matter.
  • Answers like a teammate. Replies are a few sentences, with the full details one tap away.
  • Knows who is writing. Each Zip has its own picture and its own sound in your notifications.

Work With Many Zips at Once

You can ask for several things at once. Each Zip takes its own job, and they all work at the same time.

Each Zip Has Its Own Computer

Zips sign in to websites and use them on their own computers and browsers, so your phone stays yours. With your okay, they can work on your Mac too.

Zero Asks Short Questions

When something needs a decision, Zero asks one short question with answers you can tap.

Zips Keep Your Routines

Set up a routine once, like a look at the week ahead every Monday, and the Zip runs it on schedule.

Zero Reads Your Gmail and Calendar

Sign in with Google, and your Zips can see what lands in your inbox and what is on your schedule.

Give Each Zip a Job

Keeps track of what you owe. Bills reads bill emails in your Gmail, tells you what is due and when, and asks before it pays anything.

You can make a Zip for any job you want to hand off.

Who Decides What Zips Do?

You decide, and Zips do the work.

Nothing Goes Out Until You Allow It

Before a Zip sends a message, spends money or deletes something, it shows you a card with the details and waits for your tap.

Sensitive Sites Always Ask

When a Zip wants to sign in to a site that involves money, health or account settings, it asks you every time.

You Can Watch or Take Over

Open any Zip’s computer to see what it is doing, and take over whenever you want.

Where Do You Use Zero?

Zero is on your iPhone and your Mac. Type a message, say it out loud, or call Zero and talk it through.

A chat with Zero on iPhone.

Meet Your First Zip

Start with Zero, then add a Zip for each job you want off your plate.

Set Up Zero With Your AI Assistant

Zero is easiest to set up with the AI assistant you already pay for. Pick the computer Zero should live on, copy the prompt, then open ChatGPT or Claude and paste it.

I want to set up Zero, a personal assistant app for Mac and iPhone (https://heyzero.app). I am not technical, so please walk me through it one step at a time. Keep each message short, tell me exactly what to click, and wait for me to say I am done before the next step. If something looks different from what you describe, ask me what I see. Zero will live on a Mac at home that stays on, like a Mac mini, and I will use it from my iPhone and my other Mac. First, help me check that I have what Zero needs: a Mac to leave on at home with Apple silicon (M1 or newer) on macOS 14 or later, and a Claude Pro or Max plan or a ChatGPT Plus or Pro plan. These are the steps: 1. On my iPhone, install Apple's TestFlight app from the App Store, then open https://heyzero.app/testflight on the iPhone and install Zero. 2. On the Mac that stays on, go to https://heyzero.app/download to download Zero for Mac. 3. Open the Zero file in my Downloads folder. In the window that appears, drag Zero onto the Applications folder. 4. Open Zero from the Applications folder. If it offers to move itself to Applications, I click Move to Applications. 5. Click Set Up Zero on This Mac and wait a few minutes. 6. Click Sign In With Claude or Sign In With ChatGPT, whichever plan I have, and sign in on the page that opens in my browser. Zero continues by itself after that. 7. Answer Zero's short welcome questions on the Mac. 8. When the Mac shows a code, I point my iPhone's Camera at it and tap the link. Zero opens on my iPhone with the code filled in, and I tap Connect. 9. Keep this Mac ready: in System Settings, open Energy (called Energy Saver on older Macs) and turn on the option that keeps the Mac from sleeping when the display is off, and the option to start up after a power failure if it is there. On a MacBook, these are under Battery, then Options. Then open Users & Groups and set Automatically log in as to my account, so Zero starts again after a restart. If my Mac does not offer that, I log in after each restart. 10. For my other Mac: on the Mac that stays on, open Zero's Settings with the round button showing my initials at the bottom left of the window (or press Command and comma), click Pair a Phone or Mac, then click Send the Link and send it to my other Mac with AirDrop or Messages. On the other Mac, download Zero, drag it to Applications and open it, but do not click Set Up Zero on This Mac. Then open the link I sent and click Connect. If the link is not clickable, I copy it, click Connect to Another Home if Zero shows it, then Sign In With a Pairing Code, then Paste Link. If a Mac asks whether to accept incoming network connections, I click Allow, even if it names python instead of Zero. My iPhone and my other Mac reach Zero when they are on the same Wi-Fi as the Mac that stays on. If the code expires, I click Make a New Code, or open Settings again and click Pair a Phone or Mac.

Zero for iPhone

iPhone preview through TestFlight. It works with Zero running on your Mac or home computer, and it is still a preview, so some things will change.

Get Zero for iPhone

Zero for Mac

Mac app, signed by Apple. The Mac app sets everything up, so drag Zero to your Applications folder and open it.

Download for Mac

Zero is free to run with your own ChatGPT or Claude plan. See Pricing

Have a computer that stays on? Run Zero on a Home Computer