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S6. App types

What this page helps you do

Get a quick plain-English description of the app types used in the guide.

Why it matters

Builders often say “website” when they really mean “small app with login and a database.” The right label helps you pick a safer path.

You should already have

  • a basic idea of what your app does

Skip this page if

What to do

P1. Simple website

Mostly public pages. Little or no user data. No complicated app behavior.

P2. SaaS web app

Users sign in, create or manage data, and expect the app to stay available.

P3. AI app

The app depends on AI output, model calls, prompts, retrieval, or usage limits.

P4. Internal tool

Used by a known team or company. Access control and reliability matter more than public marketing pages.

P5. API/backend

The main thing you ship is a service other systems talk to.

If people sign in or save data, do not treat it as a simple website.

Common mistakes

  • calling an AI app a normal web app because the interface looks simple
  • calling a logged-in app a website because it only has a few pages
  • forgetting that internal tools still need safe access and backups

Next step

Go to S4. Choose your path.

Advanced notes

TODO for contributors: add short examples of well-known app shapes that fit each category.