How to Build a Mobile App with AI
And Make $10,000–$20,000/Month

The exact playbook — no coding experience required
by Greg · @gregvibecodes · gregvibe.codes

This Is Already Happening

George was 18 years old and had never written a single line of code.

He built a mobile app in one month using AI.

That app now makes $17,000 a month.

Mal Baron built a simple prayer app in 3 days with Cursor and Claude. Six months later it was making $21,000 a month with a 43% conversion rate.

Connor was 23, no CS background, watched YouTube videos, built a class action lawsuit app in under 2 weeks using 100% AI. Won a hackathon of 55,000 people and scaled it to $20,000 a month.

These aren't outliers anymore. They're examples of what's now possible when you use the right tools and follow the right process.

This guide is that process.

Why Mobile Apps?

There are 1.65 billion iPhone users in the world. There are 3 billion Android users. Most of them open 10–30 apps a day and pay subscriptions without thinking twice.

The app store model is one of the cleanest businesses that exists:

The problem until now was that building apps required years of learning Swift (iOS) or Kotlin (Android), thousands of dollars in developer time, and months of work before you could even test an idea.

That world is over.

With Claude Code, Cursor, and the tools in this guide, you can go from idea to published app in 2–4 weeks. No team. No agency. No technical background.

The Numbers That Make This Worth Your Attention

Who Result
Mal Baron — Prayer Lock $21,000/month in 6 months
Connor — Payout app $20,000/month in 50 days
George — Wrestle AI $17,000/month in 4 months
App in app store (PDF scanner) $4,000,000/month
Construction estimator app $4,800,000/month and growing

These are not Silicon Valley startups. These are solo builders using AI tools.

Step 1: Finding an Idea That Will Actually Make Money

Most people get stuck here. They try to invent something completely new, spend 3 months building it, and discover nobody wants it.

The people making money in apps are doing the opposite.

The Winning Strategy: Improve What's Already Working

Go to the App Store. Search any category — productivity, health, finance, faith, education, fitness. Sort by top grossing. Look at the apps making $50,000+ per month.

Now ask: can I build a better version of this? Not a 10x better version. Just better — cleaner design, better onboarding, one feature they're missing, or a more specific niche.

Mal looked at an app called Praycreen (phone blocker until you pray) and said: "I can do this better." He did. He made $21,000 per month.

Connor looked at the class action lawsuit space and built a cleaner, more polished version of the concept.

If you're building a modified version of an existing successful app, your idea is already validated. You don't need to prove demand — it already exists. Your job is just to execute better.

How to Find Validated Ideas

The Best Niches Right Now

Apps that tap into core human desires convert and retain the best. These desires are universal: make more money, get healthier, look more attractive, feel connected, reduce stress.

Niche Why It Works Revenue Potential
Faith & spirituality Deep emotional connection, low competition $10K–$50K/month
Fitness tracking Habit-forming, subscription friendly $20K–$200K/month
Finance & money tools People pay to make/save money $15K–$100K/month
AI-powered utilities PDF, scanner, document tools $50K–$4M/month
Niche sports coaching Specific audience, high intent $10K–$50K/month
Contractor & trade tools Underserved, high willingness to pay $50K–$5M/month
Language learning Proven demand, gamification works $20K–$100K/month
Mental health & sleep Massive TAM, sticky habits $30K–$500K/month

Step 2: Design Before You Build

Most first-time builders skip this step and pay for it later.

The design of your app — especially the onboarding — is worth more than any feature you build. Why?

Because 90% of your users will only ever see your onboarding.

If your app has a paywall, most users hit it during or right after onboarding. The onboarding is your sales pitch. It determines whether they pay or leave forever.

How to Design Your Onboarding

Connor's process: download 20 apps, screenshot every single onboarding screen, put them all in one Figma file, pick the best screens from each, combine them into your own flow with your own theme.

What makes a high-converting onboarding:

Designing the Data Structure

Before you start building, write down what data your app needs. What does a user look like? What does a record look like? What relationships exist between objects?

Create a text document with this structure and some example JSON. This is what you'll give Claude when you start building. It dramatically reduces hallucinations and makes the AI build exactly what you want.

Example for a habit tracker:

{ "user": { "id": "123", "name": "Tyler", "streak": 14 }, "habit": { "id": "456", "name": "Exercise", "completed_today": true, "xp_earned": 10 }, "mood_log": { "date": "2026-03-10", "emoji": "😊", "notes": "Good day" } }

Feeding this to Claude before building saves hours of back-and-forth.

Step 3: Building the App with AI

This is where most people expect it to be hard. It's not.

The tools available today make building a mobile app closer to writing than to programming. You describe what you want. The AI builds it. You review, test, and iterate.

The Tools Stack

Tool What It Does Cost
Claude Code The best AI coding tool — builds and manages your entire codebase $20/month
Cursor IDE that connects to Claude, runs your app, shows simulator $20/month
Xcode Apple's build tool — needed for iOS apps Free
Antigravity Google's vibe coding tool — full stack apps in browser Free tier
Ror / Vibecode.dev Mobile-first AI builder with Expo Free tier
Supabase Database and authentication backend Free tier
RevenueCat Subscriptions, paywalls, analytics $0 + 1% of revenue
Vercel Hosting and deployment Free tier
GitHub Version control — your safety net Free

Total cost to get started: ~$40/month (Claude + Cursor). Everything else is free until you're making money.

The Build Process: Step by Step

  1. Set up the project. Open Xcode, create a new iOS project. Give it a name. Open that folder in Claude Code. Now Claude knows it's working in an iOS app.
  2. Build the core functionality first. Skip the onboarding. Build the main feature that makes the app useful. Get that working and tested before anything else.
  3. Use simple, specific prompts. Don't oneshot the whole app in one prompt. Break it into features. Each prompt should describe one specific thing.
  4. Use Claude as a creative partner. Don't just give commands. Ask: "What retention features could I add?" "What are 3 ways to implement this?" Claude will suggest things you wouldn't think of.
  5. Test constantly. Use the iPhone simulator in Xcode after every change. Test on a real device using Expo Go. Don't build 10 features and test once at the end.
  6. Fix errors without panic. When the app throws an error, paste it directly into Claude. It will tell you exactly what to fix. Errors are normal. They're not failures.
  7. Commit to GitHub regularly. Claude can go down rabbit holes and break your app. GitHub is your reset button. Commit after every feature that works.

The Prompt That Gets You Started

You are building an iOS habit tracker app.

Core features to build first:
- User can add a new habit with a name
- User can tap a checkbox to mark a habit complete for today
- App shows current streak (days in a row completed)
- Simple, clean UI — minimal, no clutter

Data structure:
{ "habit": { "id": string, "name": string, "completed_today": bool, "streak": int } }

Do NOT build onboarding, paywall, or any backend yet. Just the core functionality, clean and working.

Once the core works, add features one at a time:
- XP system and levels (makes the app feel like a game — massively increases retention)
- Mood tracker with emoji + optional journal entry
- Streak notifications
- Weekly progress charts
- Onboarding with personalization questions
- Paywall (via RevenueCat)

Features That Increase Retention (And Revenue)

High retention = high LTV = more money. The best apps are designed to be used every day. Here's what works:

Step 4: The Paywall That Converts

Most apps fail not because the product is bad, but because the paywall is wrong.

The paywall is your pricing page. It's where users decide: pay or leave. Getting this right is worth more than any feature you could add.

RevenueCat: The Only Tool You Need

RevenueCat handles all subscriptions, paywalls, trial management, and revenue analytics. It integrates with iOS and Android in about 30 minutes. Claude can do it for you — just add it to your requirements doc and ask Claude to integrate RevenueCat.

Paywall Best Practices

Pricing That Works

Model Price Point When to Use
Weekly subscription $4.99–$9.99/week High-urgency apps (habit formation, urgent problems)
Monthly subscription $7.99–$19.99/month Most utility apps, stable recurring revenue
Annual subscription $29.99–$79.99/year Best LTV, attach free trial here
One-time purchase $1.99–$9.99 Simple utilities, lower barrier to entry

Step 5: Backend, Database, and Auth

Here's something most tutorials won't tell you:

You might not need a backend.

Mal's app makes $21,000 a month and has no database and no authentication. Everything is stored on the device. This reduces friction (no signup required) and reduces cost (no backend bills).

When to skip the backend:

When you do need a backend:

The Stack If You Need a Backend

Step 6: Shipping to the App Store

This is the part most people are afraid of. It's actually straightforward.

If you get confused at any step, paste your question into Claude and say "walk me through this step by step." Claude knows the entire App Store submission process.

iOS App Store Submission

  1. Apple Developer Account. $99/year. Sign up at developer.apple.com.
  2. App information in Xcode. Click your project, fill in: display name, bundle ID, category, version, build number.
  3. App icon. Use Nano Banana or generate one with Claude/ChatGPT. Must be 1024x1024 PNG.
  4. App Store screenshots. Use AppScreens.io to generate screenshots from templates. Takes 15 minutes.
  5. Archive and submit. In Xcode: Product → Archive → Distribute App. Follow the prompts and submit.
  6. Wait for review. Usually 24–48 hours. If rejected, Apple tells you exactly why and you fix it.

Before submitting to the App Store, publish a web or TestFlight version and get 10–20 real users testing it first. This gives you real feedback and catches bugs before Apple sees them.

Android (Google Play)

Google Play requires a one-time $25 developer registration. The process is similar: package the app (Expo handles this), create a Play Store listing, upload the APK, and submit for review.

If you use Ror.ai or Expo, cross-platform builds (iOS + Android) are mostly handled automatically.

Step 7: Marketing — The Part That Actually Matters

Building is the easy part now. Distribution is the hard part.

George said it clearly: after he launched, he posted 40 times per day across 12 accounts. Mal's wife filmed UGC reaction videos. Connor ran influencer campaigns.

Nobody accidentally goes viral. You have to make it happen.

Phase 1: Organic Content (Month 1–2)

Start here. This is free, it teaches you what resonates, and the best-performing organic videos become your paid ad creatives later.

What works best for app growth:

Post on TikTok and Instagram Reels. You don't need all platforms. Pick one and post at minimum 5–10 times per week.

When one format starts getting 10K+ views, that's your signal. Double down on that exact format. Don't chase variety when you find what works.

Mal's rule: It wasn't until his 40th post that he found a hook that worked. Volume is the strategy. Most people quit at post 5.

Phase 2: Influencers and UGC Creators (Month 2–3)

Once organic is working, scale it with creators. Find people in your niche who already post content about your app's topic.

Send them the app for free. Ask for a review or demo video. Pay for posts if needed — usually $100–$500 per video for micro-influencers.

The goal: build a library of ad creatives. Every video they post becomes a potential ad you can run on TikTok or Meta.

Phase 3: Paid Ads (Month 3+)

Don't run paid ads until your download-to-trial rate is above 10%. If your onboarding doesn't convert organically, ads will just burn money faster.

When you're ready:

The App Store Itself as a Marketing Channel

Don't ignore organic App Store discovery. It's free and it compounds over time.

A Realistic 90-Day Plan

Days 1–7: Research and Design

Use Sensor Tower to find 3–5 apps in a niche making $50K+ per month. Download them. Screenshot every onboarding screen. Build a Figma file with all the best screens.

Write your data structure document. Decide on your core features (max 3). Write your requirements document that you'll paste into Claude.

Days 8–21: Build V1

Open Xcode, create your project, open in Claude Code. Build the core feature first. Then the rest of the app one feature at a time.

Set a hard deadline: V1 must be done by day 21. No perfectionism. A working app beats a perfect mockup every time.

Add RevenueCat for the paywall. Test the subscription flow on a real device.

Days 22–28: Submit and Wait

Create your App Store listing. Write your description (use Claude). Generate screenshots. Submit to Apple.

While waiting for approval, set up your social media accounts and start creating content about the app.

Days 29–60: Post 40x Per Week and Optimize

Post organic content every day. Don't stop until you find a format that gets 10K+ views. Then repeat that format.

Use RevenueCat to monitor your conversion rate. If it's below 10%, rewrite and rebuild your onboarding.

Respond to every review. Improve the app based on feedback. Keep shipping.

Days 61–90: Scale

If organic is working, hire a UGC creator. Test TikTok Spark Ads at $20/day.

Look at your data: which acquisition channel has the best CPT? Double it.

At this point, if you've followed the playbook, you should be at $2,000–$5,000/month minimum. Some people are at $20,000+.

Mistakes That Kill Apps Before They Launch

The Bottom Line

The people making $10,000–$20,000/month from apps aren't better developers than you. They're people who started, shipped, failed, iterated, and refused to quit. The tools exist. The only thing missing is you starting.

Want the Full System?

This guide gives you the foundation. My courses give you the exact step-by-step process, templates, and support to build your first mobile app in 4 weeks.

See The Systems

Follow my journey building SaaS and mobile apps:

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