The exact process we use to ship iOS and Android apps in 4-8 weeks. No shortcuts that break at scale.
By David Friedman, Founder of AppBrewers
I have shipped 40+ mobile apps in the last five years. Some took 4 weeks. Some took 12. The difference was never the idea -- it was the process. Here is the exact process we use at AppBrewers to ship production mobile apps in 4-8 weeks.
Step 1: Validate Before You Build (Week 1)
The 100 Euro Validation Test
Before writing code, spend 100 Euro and one week to answer three questions:
- Does anyone want this? -- Create a landing page with a waitlist. Run 50 Euro of ads. If fewer than 10 people sign up, kill the idea.
- Will they pay? -- Email the waitlist. Offer a pre-order at 50% off. If fewer than 3 people pay, the problem is not painful enough.
- Can I build this? -- Map the core feature. If it requires more than 3 screens, it is too big for v1.
Tools we use:
- Carrd or Typedream for landing pages (0-19 Euro)
- Brevo or Mailchimp for email (free tier)
- Meta Ads or Google Ads for traffic (50 Euro test budget)
Step 2: Choose Your Stack (Week 1)
For Cross-Platform (iOS + Android)
| Framework | Best For | Limitation |
|---|---|---|
| React Native | Most apps | Performance ceiling at scale |
| Flutter | UI-heavy apps | Smaller ecosystem |
| Expo | Rapid prototyping | Ejecting adds complexity |
For Native iOS Only
| Approach | Best For | Limitation |
|---|---|---|
| Swift + SwiftUI | Performance-critical apps | No Android reuse |
| Swift + UIKit | Complex custom UI | Longer development |
Our Recommendation for 2026
| Scenario | Stack | Cost | Timeline |
|---|---|---|---|
| MVP, both platforms | React Native + Expo | 8,000-15,000 Euro | 4-6 weeks |
| Scale, both platforms | React Native + native modules | 15,000-25,000 Euro | 6-10 weeks |
| iOS only, any stage | Swift + SwiftUI | 15,000-35,000 Euro | 8-12 weeks |
Read our full comparison: React Native vs Flutter in 2026
Step 3: Design the Core Loop (Week 1)
Every successful app has a core loop -- the 3-step action users repeat:
| App | Core Loop |
|---|---|
| Uber | Request ride -> Track driver -> Rate trip |
| Scroll feed -> Engage -> Post | |
| Duolingo | Start lesson -> Answer questions -> Earn points |
Your job: Define your core loop in one sentence. Everything else is v2.
Step 4: Build the MVP (Weeks 2-5)
The 3-Screen Rule
Your MVP should have exactly 3 screens:
- Onboarding/Auth -- Sign up, log in, permissions
- Core Feature -- The one thing users open the app for
- Profile/Settings -- Account, preferences, logout
Week-by-Week Breakdown
| Week | Task | Deliverable |
|---|---|---|
| Week 2 | Auth + Navigation | Login works, app structure ready |
| Week 3 | Core Feature | Main user action works end-to-end |
| Week 4 | API Integration | Backend connected, data flows |
| Week 5 | Polish + Testing | Bug fixes, performance, production build |
Step 5: App Store Preparation (Week 6)
Required Assets
- App icon (1024x1024 PNG)
- Screenshots for iPhone and iPad
- App preview video (optional but recommended)
- Privacy policy URL
- App description and keywords
- App Store Connect account (99 Euro/year)
Common Rejection Reasons
- Missing privacy policy
- App crashes on launch
- Broken in-app purchases
- Misleading screenshots
- Adult content without age rating
Step 6: Launch to 100 Users (Week 7)
The Soft Launch Checklist
- [ ] Core loop works without bugs
- [ ] App Store approved
- [ ] Push notifications work
- [ ] Analytics (Firebase) active
- [ ] Error tracking (Sentry) active
- [ ] Privacy policy and ToS pages live
- [ ] First 10 users can use the app without help
Where to Find First Users
- Your waitlist -- Email everyone who signed up during validation
- Reddit -- Post in relevant subreddits (r/iosprogramming, r/reactnative)
- Twitter/X -- Share your launch thread
- Product Hunt -- Schedule for a Tuesday at midnight PST
- Indie Hackers -- Post a milestone story
Step 7: Iterate Based on Data (Week 8)
Metrics to Track
| Metric | Target | What It Tells You |
|---|---|---|
| Day 1 retention | >40% | Is onboarding clear? |
| Day 7 retention | >20% | Is the product sticky? |
| Day 30 retention | >10% | Is there long-term value? |
| Crash-free rate | >99% | Is the app stable? |
| Average session | >2 min | Is content engaging? |
What to Build Next
- Low retention -> Simplify onboarding or add notifications
- Low engagement -> Add gamification or social features
- High churn -> Interview users who deleted the app
Cost Breakdown
| Stage | DIY (React Native) | Agency (AppBrewers) |
|---|---|---|
| Validation | 100 Euro | 500 Euro |
| Design | 0 (template) | 2,000-4,000 Euro |
| MVP Build | 3,000-10,000 Euro | 8,000-15,000 Euro |
| App Store | 99 Euro/year | Included |
| Hosting | 0-50/month | Included for 60 days |
| Launch | 0 | Included |
| Total v1 | 3,200-10,200 Euro | 10,500-16,500 Euro |
Read our full cost breakdown: iOS App Development Cost in 2026
Common Mistakes
Building Too Much in v1
Founders want AI, social features, and analytics in the MVP. The result: 6-month build, 40,000 Euro spent, zero downloads.
Fix: Strip to 3 screens. Launch in 4 weeks.
Ignoring Android
If you choose native Swift, you have no Android app. If your market is global, you lose 70% of users.
Fix: Start with React Native unless you have a strong reason to go native.
No Monetization in v1
Founders say we will add in-app purchases later. Later never comes. If you do not charge from day one, you do not know if anyone will pay.
Fix: Add RevenueCat in week 5. Even if it is just a 2.99 Euro one-time purchase.
Perfectionism
Just one more feature before launch. This kills more apps than bad ideas.
Fix: Launch when it is embarrassing. Fix in production.
Need Help Building?
We have shipped 40+ mobile apps. If you want it done right, fast:
Originally published on the AppBrewers Blog.
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