Zzz
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Quick start

From your first sentence to an app running on your iPhone, step by step.

1. Describe your idea

Open 3zzz.app/build and write what you want, in plain language. One or two sentences are enough to start:

A workout tracker where I log my sessions, see my weekly streak and get a summary every Sunday.

The more concrete you are about who the app is for and what the main screen shows, the closer the first version will be to what you have in mind.

2. Review the plan

For a new project, Zzz first replies with a short plan: the screens, the features, the look. Read it, adjust anything in the chat ("make it dark", "add a profile screen"), then start the build. If you prefer to skip straight to code, the fast mode builds directly from your first message.

3. Watch your app come to life

Zzz writes a real iPhone app, screen by screen. Open the preview to see it in an iPhone frame right in your browser: tap around, navigate, try the flows like a real user.

4. Iterate in the chat

Everything happens in conversation. Ask for one change at a time and check the result:

  • "Make the streak card bigger and add a flame icon."
  • "Add an onboarding with 3 screens before the home."
  • "The Save button does nothing on the workout screen, fix it."

5. Test it on your iPhone

When it feels good in the preview, test it on a real device. Zzz shows a QR code: scan it with your iPhone and your app opens on your phone in seconds. See Preview and testing.

6. Connect what your app needs

Accounts and data? Connect Supabase. Subscriptions? RevenueCat. AI features? Plug an AI provider key. Zzz wires everything for you: you just connect the account.

7. Publish to the App Store

When your app is ready, Zzz guides you through publishing: it prepares the listing, generates the screenshots and submits to Apple. See Publish to the App Store.

Good to know

  • Your first project is free: you can go from idea to working preview without a card.
  • You can always come back later: your projects and their whole chat history are saved.