How to Design a Mobile App Without a Designer (Using AI)

The Design Problem Every Founder Faces

You have an app idea. You know what it needs to do. But to get a developer to build it — or to show investors what it looks like — you need designs.

Hiring a UI/UX designer for a full app design costs between $3,000 and $15,000 and takes 2-6 weeks. Most early-stage founders can't afford either the money or the time.

Learning Figma yourself is an option, but realistically takes months before you can produce professional-quality designs.

There's a faster path.

AI-Generated App Design

Criei.ai lets you describe your app in plain English and generates professional mobile app designs instantly.

The key is specificity in your prompt. The more detail you provide, the better the output.

How to Write a Good App Design Prompt

A strong prompt covers:

1. App type and purpose — what does it do?
2. Target user — who is it for?
3. Color scheme — specific colors or a mood
4. Key screens — what do you need to see?
5. Style direction — minimal, bold, playful, professional?

Example: Fitness App

❌ Weak prompt: "A fitness app"

✅ Strong prompt: "A workout tracking app for intermediate gym-goers. Dark background with neon green accents. Three screens: (1) Home with today's workout summary, streak counter, and quick-start button. (2) Active workout screen with exercise list, sets/reps, rest timer, and progress bar. (3) Progress screen with weekly volume chart and personal record highlights. Clean, motivating UI."

Example: Food Delivery App

✅ Strong prompt: "A food delivery app for a single restaurant called 'Bella's Kitchen'. Warm red and cream color scheme. Menu screen with categories at top (Appetizers, Mains, Desserts, Drinks), item cards with photo, name, price. Cart button in corner with item count. Order confirmation screen with estimated time and map placeholder."

What You Can Generate

Home screens — The first thing users see. Sets the tone for the entire app.

Onboarding flows — The 3-5 screens that walk new users through setup or sign-up.

Core feature screens — The main functionality of your app.

Settings and profile pages — Often overlooked but important for completeness.

Dashboard and analytics views — Data visualization, stats, and summary screens.

From Design to Development

Once you have your Criei.ai designs, you can:

1. Show developers exactly what to build — reduces back-and-forth by 80%
2. Present to investors with professional mockups instead of rough sketches
3. User test the concept before spending money on development
4. Get stakeholder buy-in from team members or partners

A developer who receives clear designs can quote more accurately and build faster. A $10,000 app project with clear designs often comes in at half the time of one where designs are vague.

Cost Comparison

Try It on Your App Idea

Write a prompt describing your app — be specific about the screens you need, colors, and purpose. Generate your design at criei.ai →

Most people are surprised by how close the first result is to what they had in mind.