AI PROTOTYPE TO APP DESIGN

Your AI-built prototype works. Now make it a product people trust.

You built it in Lovable, Bolt, Cursor or Replit, and it runs. But the flows feel improvised and every screen looks a little different. We keep what your prototype proved, fix what it skipped, and turn it into a mobile app design your team or your AI tools can build from.

Show us your prototype

Show us your prototype

Explore our work

Explore our work

Prototype review. UX restructure. Production-ready UI.

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01 โ€” SIGNALS

It works on your screen. It doesn't yet work for your users.

Every screen follows its own rules

Buttons, spacing and colours change from page to page because each one was generated separately.

The happy path is the only path

Empty, loading and error states are missing, so the app breaks the moment real data arrives.

Navigation grew one prompt at a time

Features sit where they were added, not where users look for them.

It looks like every other AI app

Default components and stock gradients make the product feel generic and harder to trust.

Mobile is an afterthought

The layout was built for a desktop preview and gets cramped on a phone.

You don't know what to fix first

You can see something is off, but not which problems block users and which are polish.

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02 โ€” WHAT WE FIX

Sample image โ€” placeholder

Keep what the prototype proved. Rebuild what it skipped.

We treat your prototype as the best brief you could give us: it shows what the product does. Our job is to decide how it should work.

01

Prototype review

Walk through the build, the core tasks and the places users get stuck or lost.

02

Flow restructuring

Turn generated screens into clear journeys with one obvious next step.

03

Missing states

Design the empty, loading, error and permission states the prototype never needed.

04

Mobile-first layout

Rework screens for one-handed use, real content lengths and iOS and Android conventions.

05

Consistent UI system

Replace one-off styles with a small set of components, type and colour rules.

06

Build-ready handoff

Organised Figma files your developers, or the AI tool you already use, can build from.

01

Prototype review

Walk through the build, the core tasks and the places users get stuck or lost.

02

Flow restructuring

Turn generated screens into clear journeys with one obvious next step.

03

Missing states

Design the empty, loading, error and permission states the prototype never needed.

04

Mobile-first layout

Rework screens for one-handed use, real content lengths and iOS and Android conventions.

05

Consistent UI system

Replace one-off styles with a small set of components, type and colour rules.

06

Build-ready handoff

Organised Figma files your developers, or the AI tool you already use, can build from.

01

Prototype review

Walk through the build, the core tasks and the places users get stuck or lost.

02

Flow restructuring

Turn generated screens into clear journeys with one obvious next step.

03

Missing states

Design the empty, loading, error and permission states the prototype never needed.

04

Mobile-first layout

Rework screens for one-handed use, real content lengths and iOS and Android conventions.

05

Consistent UI system

Replace one-off styles with a small set of components, type and colour rules.

06

Build-ready handoff

Organised Figma files your developers, or the AI tool you already use, can build from.

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03 โ€” WHAT YOU GET

From a working demo to a design you can build on.

See what changes, why it changes and how the product should work at every step.

See what changes, why it changes and how the product should work at every step.

Annotated screens โ€” sample format

A

Prototype findings

What works, what breaks and what to fix first, in one prioritised list.

Priority map โ€” sample format

B

Revised flows

The core journeys restructured, including the states your prototype skipped.

Audit report โ€” sample format

C

UI system

Components, type, colour and spacing rules applied across the product.

Action roadmap โ€” sample format

D

Redesigned screens

Key mobile screens in Figma, ready for review.

Walkthrough call โ€” sample format

E

Prototype and handoff

A clickable prototype and files prepared for your developers or AI tools.

Annotated screens โ€” sample format

A

Prototype findings

What works, what breaks and what to fix first, in one prioritised list.

Priority map โ€” sample format

B

Revised flows

The core journeys restructured, including the states your prototype skipped.

Audit report โ€” sample format

C

UI system

Components, type, colour and spacing rules applied across the product.

Action roadmap โ€” sample format

D

Redesigned screens

Key mobile screens in Figma, ready for review.

Walkthrough call โ€” sample format

E

Prototype and handoff

A clickable prototype and files prepared for your developers or AI tools.

Annotated screens โ€” sample format

A

Prototype findings

What works, what breaks and what to fix first, in one prioritised list.

Priority map โ€” sample format

B

Revised flows

The core journeys restructured, including the states your prototype skipped.

Audit report โ€” sample format

C

UI system

Components, type, colour and spacing rules applied across the product.

Action roadmap โ€” sample format

D

Redesigned screens

Key mobile screens in Figma, ready for review.

Walkthrough call โ€” sample format

E

Prototype and handoff

A clickable prototype and files prepared for your developers or AI tools.

Findings are based on the prototype and access agreed for the project. A better design does not guarantee adoption or revenue without real users and measurement.

Selected projects.

Selected projects.

View All Projects

View All Projects

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04 โ€” HOW WE WORK

Start from what you built, not from a blank page.

STEP

KICK-OFF

REVIEW

DELIVERY

01

Review

Go through your prototype, your goals and what you have learned from users so far.

02

Prioritise

Agree which journeys matter most and what can wait.

03

Restructure

Fix the flows, navigation and missing states.

04

Design

Build the UI system and redesign the key screens.

05

Hand over

Prepare files and notes so the product can be rebuilt without guessing.

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05 โ€” WAYS TO START

Two ways to move forward.

For founders with a working AI-built prototype.

AI Prototype to App Design

Start from your prototype and work toward a clear, consistent mobile app design your team can build.

Weโ€™ll review your request and get back to you within 24 hours.

Not sure your prototype needs a redesign?

30 MIN

Free Product Diagnosis

Free Product Diagnosis

Walk us through it in a free 30-minute Product Diagnosis and decide whether to start with a review, a few key flows or the whole app.

Walk us through it in a free 30-minute Product Diagnosis and decide whether to start with a review, a few key flows or the whole app.

Discuss your biggest product challenge

Discuss your biggest product challenge

Get an expert perspective on whatโ€™s working and whatโ€™s not

Get an expert perspective on whatโ€™s working and whatโ€™s not

A clear summary of next steps within 24 hours

A clear summary of next steps within 24 hours

Ivan Anisimov, founder of Grona
Ivan Anisimov, founder of Grona

Book a free 30-min diagnosis โ†’

Book a free 30-min diagnosis โ†’

Free ยท 30 minutes ยท With Gronaโ€™s founder

Free ยท 30 minutes ยท With Gronaโ€™s founder

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COMMON QUESTIONS

A little more clarity.

Yes. Share a link to the running prototype and, if you can, access to the project. We review the product as users see it; the tool it was built with does not limit the design.

No. We are a design agency: we deliver the design, the prototype and the handoff files. Your developers, or your AI tool, implement them.

Usually not. We keep the parts your prototype already proved and fix the flows and screens that block users. If the structure cannot hold the product, we will say so before you spend more on building.

That's common at this stage. We hand over files and notes written so that a developer or an AI coding tool can follow them, and we can advise on what to build first.

An audit lists and prioritises the problems. This service also designs the fixes: new flows, a UI system and redesigned screens.

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RELATED INSIGHTS

Get more from what you've already built.

View all insights

View all insights

/ 06 โ€” LETโ€™S TALK

You've proved the idea. Let's make it feel like a real product.

Send us a link to your prototype and tell us what users do with it. We'll tell you what we'd fix first.

Talk about your prototype โ†’

Talk about your prototype โ†’

Free

30 minutes

With Gronaโ€™s founder

Grona

Product design for ambitious founders and growing businesses

Get our weekly digest โ€” made by founder for founders

Grona

Product design for ambitious founders and growing businesses

Get our weekly digest โ€” made by founder for founders

Grona

Product design for ambitious founders and growing businesses

Get our weekly digest โ€” made by founder for founders