The most dangerous beginner prompt is also the most tempting one:
Build me an app for [idea].
It feels direct. It feels efficient. It feels like the whole point of using AI.
But if you are building your first website or mobile app with AI, that prompt is usually too empty. It asks the tool to make product decisions, architecture decisions, scope decisions, design decisions, data decisions, and launch decisions before you have told it what kind of project you are actually trying to make.
That is how a small idea turns into a pretend platform.
You wanted a simple app for tracking workout routines. AI gives you accounts, subscriptions, social features, leaderboards, wearable integrations, dashboards, an admin panel, and a database schema that looks like it should have a board of directors.
The answer looks impressive.
That does not mean it is a good first build.
Before I let AI write serious code, I want it to help me do three boring but useful things:
- Make the idea smaller.
- Name the one workflow version one must complete.
- Define what "done" means before the project starts growing extra heads.
That is the real job of planning prompts. They are not there to make you feel like a prompt wizard. They are there to keep the project from becoming harder than your current skill level, attention span, and actual use case can support.
If you want a ready-made version of this planning flow, I made a free AI App Builder Starter Prompts pack for beginners who have an app idea but do not know what to type first:
https://marcusykim.gumroad.com/l/ai-app-builder-starter-prompts
Use the prompts below as a practical planning sequence. You do not need all 25 for every project, but if you are a beginner, running through them once will probably save you from a lot of fake progress.
How To Use These Prompts
Do not paste all 25 prompts at once.
That is how you turn AI into a very confident document blender.
Use them in passes:
- First, pressure-test the idea.
- Then define the user and workflow.
- Then choose the platform and stack.
- Then map the screens, data, and rules.
- Then ask for a build plan, QA plan, and launch plan.
At each step, make the AI explain tradeoffs in plain English. If it uses a term you do not understand, stop and ask. If it proposes something too big, tell it to shrink the plan.
The goal is not to look technical.
The goal is to build a project you can actually finish.
1. The Rough Idea Prompt
Use this when your app idea still feels like a paragraph instead of a project.
I have a rough app idea: [describe the idea].
Help me turn this into a clearer app concept. Identify the likely user, the problem they have, the main workflow, and the smallest useful version one. Keep the explanation beginner-friendly and do not suggest advanced features yet.
The important phrase is "smallest useful version one."
Without that, AI often tries to describe the grown-up version of the product. You need the first useful slice, not the whole imaginary company.
2. The One User Prompt
Use this to avoid building for "everyone."
For this app idea, help me choose one specific first user. Give me three possible user types, explain which one is easiest to build for first, and recommend one user to target for version one.
"Everyone" is not a user. It is a fog machine.
You want one person you can picture. A student planning assignments. A musician saving song ideas. A freelancer tracking client demos. A gym owner managing class signups.
The more specific the first user is, the easier the app becomes to scope.
3. The One Workflow Prompt
This is one of the most important prompts in the whole list.
Define the one workflow version one of this app must complete from start to finish.
Use this format:
"Version one helps [one user] do [one job] from [starting point] to [finished result]."
Then list what is outside the scope for version one.
Your first app does not need ten workflows.
It needs one workflow that actually works.
4. The Too-Big Detector Prompt
Use this before AI starts flattering your idea into a monster.
Review this app idea as if you are trying to protect a beginner from overbuilding.
What parts are too big for version one?
What parts can wait?
What parts are probably unnecessary until real users ask for them?
Give me a smaller version I could realistically build first.
I like prompts that give AI a job besides "be helpful."
Here, the job is to protect the beginner from scope creep.
5. The Web Or Mobile Prompt
Use this when you do not know whether to start with a website, mobile app, or cross-platform build.
For this app idea, should a beginner build version one as a web app, native iOS app, native Android app, Expo app, Flutter app, or something else?
Compare the options using:
- difficulty
- speed to first version
- deployment complexity
- user expectations
- payment or account needs
- long-term tradeoffs
Then recommend one path for version one.
The point is not to find the "best" platform in the abstract.
The point is to pick the least confusing path for your first real version.
6. The Stack Explanation Prompt
Use this when AI throws tool names at you like confetti.
Recommend a beginner-friendly stack for this app and explain every part in plain English.
For each tool or service, tell me:
- what it does
- why this app needs it
- what could go wrong if I misunderstand it
- whether there is a simpler alternative for version one
If the AI cannot explain the stack clearly, you should not let it build the stack yet.
Confusion compounds. A tool you do not understand becomes a debugging problem later.
7. The No-New-Tools Prompt
Use this when AI keeps adding services because it can.
Simplify the stack. Assume I want the fewest tools possible for a working version one.
Remove any tool, service, framework, database, or integration that is not necessary for the first user workflow. Explain what we are giving up and why that tradeoff is acceptable for version one.
This is a good correction prompt when the plan starts sounding expensive, brittle, or too clever.
8. The Screen List Prompt
Use this before asking for UI code.
List the minimum screens this app needs for version one.
For each screen, include:
- screen name
- user's goal on that screen
- primary action
- data shown
- data entered
- where the user goes next
Do not include screens that are not needed for the one main workflow.
Screens are easier to reason about than vague features.
Once you can see the screens, you can start noticing whether the app is actually small.
9. The First Screen Prompt
Use this to avoid starting with a giant dashboard.
Which screen should I build first for this app, and why?
Choose the screen that teaches me the most about the core workflow. Explain what must work on that screen before I move on.
Beginners often start with the prettiest screen.
Sometimes that is fine. But usually, you want to start with the screen that proves the core action can work.
10. The Data Model Prompt
Use this when you need to know what information the app stores.
Create a simple data model for version one of this app.
Use beginner-friendly language. For each data object, explain:
- what it represents
- what fields it needs
- which fields are required
- which screen creates or edits it
- which screen displays it
Keep the model as small as possible.
Your backend is not a storage closet.
Do not let AI throw every possible field into the database just because the field might be useful someday.
11. The Data Privacy Prompt
Use this before you build accounts, profiles, uploads, or anything personal.
What sensitive or private data might this app handle?
List what data should be avoided in version one, what data must be protected, and what beginner-friendly design choices reduce privacy risk.
Do not give legal advice. Focus on practical product and engineering caution.
This prompt is not a substitute for real legal or security advice.
It is a sanity check. If your tiny first app suddenly needs sensitive data, you may need a smaller first version.
12. The Authentication Prompt
Use this before adding login.
Does version one of this app actually need user accounts?
Explain:
- what works without login
- what breaks without login
- the simplest acceptable account approach if login is necessary
- what should wait until after version one
Authentication is not just a button that says "Sign in."
It creates password resets, account states, private data rules, error states, permissions, and support problems. Sometimes you need it. Sometimes you are adding a bouncer before the room exists.
13. The Permissions Prompt
Use this for apps that need camera, microphone, files, location, contacts, notifications, or payments.
List every permission this app might request.
For each permission, explain:
- why the app might need it
- whether version one can avoid it
- what user trust issue it creates
- what fallback experience should exist if the user says no
Permissions are product decisions, not just technical switches.
If a user says no, your app still has to behave like it was designed by someone awake.
14. The Feature Priority Prompt
Use this when your feature list is getting noisy.
Here is my feature list: [paste list].
Sort these into:
1. Must exist for version one
2. Nice later
3. Probably a distraction
Explain each choice based on the one main user workflow.
The main workflow is your judge.
If a feature does not support that workflow, it probably should not be in version one.
15. The Acceptance Criteria Prompt
Use this to define "done."
Write acceptance criteria for version one of this app.
Use simple "done when" statements. Focus on what a user can successfully do, not on internal code tasks.
Include happy paths, empty states, common mistakes, and one or two failure cases.
Acceptance criteria are boring in the same way seatbelts are boring.
You notice them when you need them.
16. The Project Rulebook Prompt
Use this before the build starts.
Create a short project rulebook for this app.
Include:
- version one goal
- target user
- main workflow
- out-of-scope features
- stack decisions
- UI style rules
- data rules
- QA rules
- when to ask me before adding complexity
Write it so I can paste it into my AI coding tool as project context.
AI behaves better when the project has a source of truth.
The rulebook is how you stop re-explaining the app every fifteen minutes.
17. The Build Sequence Prompt
Use this when you are ready to turn the plan into tasks.
Turn this app plan into a beginner-friendly build sequence.
Break it into small milestones. Each milestone should produce something I can run, click, test, or inspect. Do not create a giant task list where nothing works until the end.
This matters because a beginner needs visible progress.
If the first seven tasks are invisible setup tasks, you will not know whether the app is real or just accumulating folders.
18. The First Milestone Prompt
Use this to start smaller than your ego wants.
Define the first milestone for this app.
It should be small enough to complete quickly and should prove one important part of the main workflow. Include what files or screens are likely involved, what I should test, and what not to touch yet.
Your first milestone is not "finish the app."
It is "prove one piece of the app is alive."
19. The UI Direction Prompt
Use this before AI designs a pile of generic cards.
Give me a simple UI direction for this app.
Describe the layout, navigation, visual hierarchy, and interaction style. Avoid nested cards and decorative clutter. Make the interface clear for the main workflow, and explain how the design helps the user know what to do next.
AI-generated UI often overuses boxes inside boxes inside boxes.
You can prevent some of that by telling it what clarity means before it starts drawing rectangles for a living.
20. The Empty State Prompt
Use this because every new app starts empty.
For each main screen, describe the empty state.
What does the user see before they have created anything?
What action should the empty state encourage?
What should the app avoid saying or showing?
Empty states are not filler.
They are the first version of onboarding.
21. The Error State Prompt
Use this before something breaks.
List the most likely beginner-level error states for this app.
For each one, explain:
- what went wrong
- what the user should see
- what the user can do next
- what the app should log or preserve
A project starts feeling real when it handles imperfect input, failed saves, missing data, bad network states, and user confusion.
22. The QA Checklist Prompt
Use this before trusting the app.
Create a QA checklist for version one of this app.
Organize it by workflow, screen, data, permissions, edge cases, mobile/desktop behavior, and deployment. Keep it practical enough that a beginner can run the checks manually.
AI can produce code faster than you can understand it.
That makes QA more important, not less.
23. The Bug Report Prompt
Use this when something fails and you do not know what to say.
Help me write a clear bug report for this issue:
[describe what happened]
Ask me for any missing details. Then produce a bug report with:
- expected behavior
- actual behavior
- steps to reproduce
- likely area of the app
- what evidence I should collect before asking AI to fix it
Bad bug prompts create random fixes.
Good bug prompts give the AI enough evidence to work like a teammate instead of guessing in a dark room.
24. The Deployment Plan Prompt
Use this before the app leaves your machine.
Create a beginner-friendly deployment plan for this app.
Explain:
- where this app should be deployed first
- what accounts or services I need
- what environment variables or secrets might exist
- what can go wrong during deployment
- how I can confirm the live app works
Deployment is where your app meets reality.
The earlier you understand that path, the less mysterious the project feels.
25. The Launch Readiness Prompt
Use this before you show the app to anyone.
Review this app as a version-one launch candidate.
Tell me:
- what must be fixed before anyone sees it
- what can be imperfect for a first version
- what I should test one more time
- what I should ask first users after they try it
- what I should not build until I get feedback
This prompt protects you from polishing the wrong thing.
The first launch is not a coronation. It is a learning event.
The Best Prompt Is Usually A Smaller Prompt
The pattern underneath all 25 prompts is simple:
Make AI explain the project before it builds the project.
That one habit changes the whole experience.
Instead of asking AI to invent a complete product from a vague sentence, you make it help you narrow the user, workflow, platform, stack, screens, data, edge cases, QA, and launch path.
That is how you stay in control.
You do not need to become a senior engineer before using AI to build your first app. But you do need to stop treating the AI like it can read your mind.
It cannot.
It can only work from the context you give it, the constraints you enforce, and the checks you run after it produces something.
If you want these ideas in a more guided sequence, the free AI App Builder Starter Prompts pack is built for exactly this first planning conversation:
https://marcusykim.gumroad.com/l/ai-app-builder-starter-prompts
The useful starting question is not:
Can AI build my app?
The better question is:
Can I describe the first useful version clearly enough that AI has something sane to build?
That is the whole game.
Final Takeaway
If you are a beginner, your first app should not prove that AI can generate a lot of code.
It should prove that one person can complete one useful workflow.
Start there.
Use prompts that make the project smaller, clearer, and easier to verify. Then build.
I made a free AI App Builder Starter Prompts pack for beginners who want to turn a rough app idea into a scoped first build with AI. You can get it here:
https://marcusykim.gumroad.com/l/ai-app-builder-starter-prompts
If you want the full build-along field manual behind the free prompts, AI App Builder From Zero walks through idea, scope, stack, prompting, QA, deployment, and launch:
https://marcusykim.gumroad.com/l/ai-app-builder-from-zero
You can also find me here:
Medium: https://medium.com/@marcusykim
DEV.to: https://dev.to/marcusykim
Website: https://marcusykim.com/blog/
X: https://x.com/marcusykim
LinkedIn: https://www.linkedin.com/in/marcusykim/