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Nirvaana lives in its app for Mac and Windows. Download it from nirvaana.ai/download, open it, and sign in the same way as below: “Email me a code”, or “Continue with” the account you use for work, then your second code. The first time, it opens on your own world with a welcome. In a browser, nirvaana.ai keeps your settings, your connections and these pages, and sends you to the app for the rest. There is no app for Linux or ChromeOS yet. The Mac and Windows app shows your way around it.

1. Open the app, or go to nirvaana.ai in a browser.
2. If there is a button for the account you use for work, press it. Sign in the way you normally would.
3. If there is no button, or the one you press will not work with your company account, use the email box underneath. It reads “Or email me a code” when there are buttons above it, and “Email me a code” when there are none. Type your work address and press Send.
4. Open the email and type the 6-digit code where the page asks for it. It works once, for 15 minutes. Ask for a new one any time. The email has a link too, for when you can't type the code: it works once, and only in the browser you asked from.

Anyone can make an account. 7 days free, then $9.99 a month, cancel anytime.

Signing in takes two things: the way you sign in (a button, or the emailed sign-in code) and a second 6-digit code. Everyone has it on, and it cannot be switched off. The first time, you choose where the code comes from: “Use an app” or “Email me a code”. You can change it later in Settings, under Account, then Signing in.

An app is the safer choice: someone who gets into your email, or your Google or Microsoft account, still cannot get into your world. An emailed code needs nothing installed. Each time you sign in, press “Email me a code” and type the code from the email. It works once, for 10 minutes.

With an app, the first time, right after you sign in:

1. Choose “Use an app”. If you don't have an authenticator app, install one first. Google Authenticator, Microsoft Authenticator and 1Password all work, and they are free.
2. In the app, add an account and scan the square on the page. If you can't scan it, choose to type a key instead, and type the letters under the square.
3. Type the 6-digit code the app shows for Nirvaana, and press “Continue”.
4. You are shown ten recovery codes, once. Keep them somewhere that is not your phone: a password manager, a note on your computer, or a printed page. Each one gets you in once if you lose your phone.

After that, each time you sign in, a page says “One more step”. Open the app and type the code it shows. Once you are in, that browser is not asked again until you sign out.

The chat, ready to talk: one column, the conversation and the box where you type, on a computer and on a phone alike. A new conversation shows only the Nirvaana logo and “Build your world.” Type “Catch me up” for what is due. Your very first one also says, over the box, “Nirvaana is an AI, not a person. It can be wrong, so check anything that matters.”

When something is waiting for your yes, it is a small card with buttons in the conversation itself.

Across the top is a thin strip: today's date on the left, then a row of your worlds, with your own world in the middle. It stays there on every page. Wherever you have gone, the line over the date reads “Back to today”, and pressing the date, or your own world, brings you back to the day.

Tell it about your work. Plain sentences are best. Something like:

“Our vac truck rate is $245 an hour with a four hour minimum. Malcolm at the recycling yard takes our loads on Tuesdays and Thursdays.”

It will keep facts like that. Then try asking for one back, later in the day or tomorrow:

“What do we charge for the vac truck?”

And tell it about things you owe people, with the date if you know it:

“I told Javier I'd get him the Safe Storage quote by Friday.”

That becomes a promise. Ask “Catch me up” and it is there among what is due, until it is done.

• Nothing goes out without your yes. When an app you connected would add an event, post a message or open an issue for you, it first shows you exactly what, and waits for you to press “Approve”.
• What you tell it is yours. It is private to your account until you approve putting something in a world you share with someone.
• There is no list of past chats. The point is that it remembers, so you do not have to go hunting through old conversations. If something is missing, say so, and say it again plainly.

Every screen is written in plain words. If you cannot get in, or a reply stops halfway, the trouble page has what to do.