Get a polished, production-ready Flutter mobile app — built by a London-based iOS and Android development lead with deep experience delivering apps for startups and established businesses across iOS and Android.
I Will Build a Cross-Platform Flutter App for Android and iOS
A clean, fully functional Flutter app of up to five screens built to your provided design — no external API or AI integration at this tier.
- Flutter app for Android and iOS (3–5 screens)
- Built to your provided UX/UI design
- Secure user authentication included
- No third-party or AI API integration (standard app logic only)
- Complete Flutter source code delivered
- Unlimited revisions
A larger Flutter app of up to ten screens plus a fully integrated AI chatbot — the right tier for customer-facing products that need intelligent conversational features.
- Flutter app for Android and iOS (up to 10 screens)
- Built to your provided UX/UI design
- Secure user authentication included
- AI chatbot fully integrated into the app via API
- Complete Flutter source code delivered
- Unlimited revisions
The full-scope build: extended screens, AI chatbot integration, and custom fine-tuning of the AI model so it behaves precisely as your product demands.
- Flutter app for Android and iOS (up to 15 screens)
- Built to your provided UX/UI design
- Secure user authentication included
- AI chatbot fully integrated into the app via API
- Custom AI model fine-tuning for your specific use case
- Complete Flutter source code delivered
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Value Position
Tech Stack
AI Capabilities
Delivery & Scope
Source Code & Ownership
What You'll Receive
Full Description
Your app idea deserves more than a prototype. It deserves a production-ready, visually refined Flutter application that works seamlessly on both Android and iOS — built by an experienced development lead based in London with a proven track record across industries from social media to health, booking, travel, and beyond.
This service is for founders, businesses, and entrepreneurs who want a cross-platform mobile app built in Flutter: Google and Apple's preferred framework for high-performance, native-feel applications from a single codebase. Every package includes a functional iOS app, a functional Android app, full source code, and secure authentication — so you own everything from day one.
WHAT YOU RECEIVE
Every tier delivers a working Flutter application built to your provided UX/UI design files. The Starter package covers a focused 3–5 screen app — ideal for MVPs, proof-of-concept builds, or client demos — with AI model integration and user authentication included. The Standard package scales the scope with chatbot integration layered on top, giving your app a conversational AI layer and more breathing room in the timeline. The Full package adds AI model fine-tuning, making the intelligence within your app genuinely tailored to your domain, data, and users — the complete solution for teams serious about launching a differentiated AI-powered product.
Source code is included across all tiers, so you are never locked in.
HOW IT WORKS
1. You place your order and submit your UX/UI design files, project brief, and any login credentials or API keys required.
2. The development team reviews your materials and confirms scope via the order chat — if anything is missing or ambiguous, you will be contacted before a single line of code is written.
3. Development begins, with progress communicated through the order manager.
4. The completed app is delivered with full source code. Revisions are unlimited on every tier.
NO DESIGN FILES? No problem — raise this in your order message and discuss a design-add-on before development begins, so nothing blocks your build.
WHO THIS IS FOR
This service suits early-stage startups validating an MVP, established businesses adding a mobile channel, and product teams who need an AI-integrated app built cleanly and reliably. Industry experience covers social media, food delivery, health and fitness, booking, live streaming, taxi, travel, event management, social chat, and business productivity apps.
WHY ZINN DIGITAL
Based in London and operating as a specialist Flutter studio, Zinn Digital brings both technical depth and practical commercial awareness to every project. The development lead role means accountability sits at the top — not delegated to junior contractors. The goal is always to guide you safely through the process, offering honest advice alongside clean, maintainable code.
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Compare Packages
| Feature | Starter | Builder | Studio |
|---|---|---|---|
| Delivery Time | 7 days | 10 days | 14 days |
| Revisions | unlimited | unlimited | unlimited |
| Flutter app for Android and iOS (3–5 screens) | ✓ | ✕ | ✕ |
| Built to your provided UX/UI design | ✓ | ✓ | ✓ |
| Secure user authentication included | ✓ | ✓ | ✓ |
| No third-party or AI API integration (standard app logic only) | ✓ | ✕ | ✕ |
| Complete Flutter source code delivered | ✓ | ✓ | ✓ |
| Unlimited revisions | ✓ | ✓ | ✕ |
| Flutter app for Android and iOS (up to 10 screens) | ✕ | ✓ | ✕ |
| AI chatbot fully integrated into the app via API | ✕ | ✓ | ✓ |
| Flutter app for Android and iOS (up to 15 screens) | ✕ | ✕ | ✓ |
| Custom AI model fine-tuning for your specific use case | ✕ | ✕ | ✓ |
Portfolio
Examples of the seller's work related to this Zinn.
Build a Cross-Platform Flutter App for Android and iOS
Build a Cross-Platform Flutter App for Android and iOS
Extra Information
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Frequently Asked Questions
Yes — the packages are scoped around your provided design files. If you do not have designs ready, please mention this in your order message. A UX/UI design consultation add-on is available to bridge that gap before development begins, so nothing delays your build.
Absolutely. Complete Flutter source code is included with every package across all three tiers. You own it entirely with no lock-in.
Please share your UX/UI design files, a project brief describing the app's purpose and key features, and any API keys, login credentials, or third-party service details required. The team will confirm everything via the order chat before development begins.
Yes. Customisation of existing apps is supported. A brief discovery call or chat is typically needed first to assess the existing codebase and agree on the exact scope — please raise this before placing your order so the right package is selected.
An app upload assistance add-on is available. Please note that Apple and Google require you to submit your own terms and conditions and privacy policy documents — those must come from you as the app owner.
Integration connects an existing AI model (such as a third-party API) to your app. Fine-tuning, included in the Full package, adapts and customises that model's behaviour to your specific domain, data, and use case — producing more relevant, tailored responses for your users.
All packages include unlimited revisions. Once a build is delivered, feedback is gathered via the order chat and addressed iteratively until you are satisfied with the result.
The Starter package is designed exactly for MVPs and proof-of-concept builds — a clean 3–5 screen Flutter app with AI integration and authentication at a focused price point. If your MVP needs a conversational layer, step up to Standard for chatbot integration.
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