Get a fully functional, AI-powered iOS and Android app or website — built with OpenAI, GPT, and Gemini AI by London-based AI development specialists with over five years of experience.
I Will Build a Custom AI Mobile App or AI Website for Your Business
A clean, functional AI-powered mobile app for iOS and Android with core AI integration and authentication.
- Functional iOS app
- Functional Android app
- AI model integration into your app
- AI chatbot integration
- User authentication
- Full source code included
Everything in AI Starter plus custom application or website design and AI model fine-tuning for a smarter, branded experience.
- Functional iOS and Android app
- AI model integration and fine-tuning
- AI chatbot integration
- User authentication
- Custom application or website UI/UX design
- Full source code included
The complete build — a fully designed, fine-tuned, and polished AI-powered product at full scope and scale.
- Functional iOS and Android app
- Advanced AI model integration and fine-tuning
- AI chatbot and AI agent integration
- User authentication
- Full bespoke application or website design
- Full source code included
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Key details about this service to help you decide. Generated by Zinn Hub, not the seller.
Value Position
AI Tech Stack
Cross-Platform Output
Base Delivery Time
App Category Coverage
What You'll Receive
Full Description
Your idea deserves more than a generic app. It deserves an intelligent, scalable product that works hard for your business from day one.
Zinn Digital® is a London-based AI development studio with over five years of hands-on experience building AI mobile apps, AI websites, AI agents, and AI chatbot integrations for businesses across a wide range of industries. We combine deep technical expertise with a clear focus on business outcomes — every product we build is crafted to be fast, user-friendly, and genuinely useful.
**What We Build**
From a straightforward AI-powered mobile app with chatbot integration to a fully fine-tuned AI model embedded in a polished, bespoke application or website, we handle the full development lifecycle. We work across both iOS and Android, and our web solutions use modern, performant frameworks throughout.
App categories we regularly develop include: chat, shopping, delivery, booking, restaurant, health and fitness, social networking, dating, maps and navigation, finance, medical, travel, news, real estate, and SaaS and tech platforms.
**Technologies We Use**
Our team works with Python, OpenAI API, GPT, Gemini AI, JavaScript, Keras, PyTorch, TensorFlow, FlutterFlow, Unity, React Native, Flutter, Node.js, Express, MongoDB, PostgreSQL, Firebase, and Supabase — selecting the right stack for your specific requirements rather than defaulting to a one-size-fits-all approach.
**How It Works**
1. You place your order and share your project details via the order chat.
2. We review your requirements and confirm the scope before development begins.
3. We build, integrate, and test your AI-powered app or website.
4. We deliver your source code and the finished product, with revisions included.
**Who This Is For**
This service suits founders with a product idea, businesses wanting to add AI capabilities to an existing app, and teams seeking a reliable development partner for AI chatbot, AI agent, or smart automation features. Whether you are in healthcare, finance, retail, hospitality, or any other sector, we tailor the solution to your goals.
**Why Zinn Digital®**
Over five years of proven AI development experience, direct communication throughout your project, fast and optimised development practices, and a genuine commitment to client satisfaction. You work directly with the people building your product — not a relay of account managers.
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Compare Packages
| Feature | AI Starter | AI Boost | AI Premium |
|---|---|---|---|
| Delivery Time | 5 days | 14 days | 21 days |
| Revisions | unlimited | unlimited | unlimited |
| Functional iOS app | ✓ | ✕ | ✕ |
| Functional Android app | ✓ | ✕ | ✕ |
| AI model integration into your app | ✓ | ✕ | ✕ |
| AI chatbot integration | ✓ | ✓ | ✕ |
| User authentication | ✓ | ✓ | ✓ |
| Full source code included | ✓ | ✓ | ✓ |
| Functional iOS and Android app | ✕ | ✓ | ✓ |
| AI model integration and fine-tuning | ✕ | ✓ | ✕ |
| Custom application or website UI/UX design | ✕ | ✓ | ✕ |
| Advanced AI model integration and fine-tuning | ✕ | ✕ | ✓ |
| AI chatbot and AI agent integration | ✕ | ✕ | ✓ |
| Full bespoke application or website design | ✕ | ✕ | ✓ |
Extra Information
Tools I Use
Perfect For
My Process
Frequently Asked Questions
Yes. We build AI mobile apps using Flutter, React Native, or FlutterFlow for iOS and Android, and AI websites using modern JavaScript frameworks. Both can include AI chatbot, AI agent, or other smart features powered by OpenAI API and Gemini AI.
Share your project idea, any login credentials for existing systems we need access to, and any branding or design preferences you have. The more detail you provide upfront, the faster we can begin. If we need anything further, we will reach out via the order chat.
We develop custom AI chatbots and agents that handle customer support, lead generation, booking, shopping assistance, healthcare guidance, and more. These are powered by OpenAI and other APIs to deliver real-time, intelligent responses tailored to your business.
We have built AI-powered solutions for shopping, delivery, health and fitness, finance, medical, travel, social networking, dating, real estate, restaurant, booking, maps and navigation, and SaaS platforms. Whatever your industry, we can tailor the solution to your specific goals.
Fine-tuning adapts a base AI model — such as a GPT model — to your specific domain, data, and use case. This results in more accurate, relevant, and on-brand responses compared to a generic integration. Fine-tuning is included in the AI Boost and AI Premium packages.
Unlimited revisions are included across all three packages. We work with you until the delivered product meets your agreed requirements.
Yes. Source code is included with every package. You will have full ownership of the codebase delivered at the end of the project.
We design scalable backend workflows, connect NLP and LLM models via the OpenAI API, and build the frontend to surface smart features such as natural conversation, recommendations, and automation — all optimised for performance and reliability.
Customer Reviews
See what our customers say about this Zinn
The storytelling experience is amazing. The AI-generated paths feel creative, the UI is immersive, and replaying stories with different choices is a lot of fun. Communication was clear throughout, and delivery was right on time. Very satisfied.
Working with Raton was a fantastic experience! The AI meeting summary system works flawlessly and saves a huge amount of time. Communication was excellent, progress updates were consistent, and the final delivery exceeded expectations. Highly recommended!
Raton did an amazing job with the AI Music Mood Generator app. The experience feels smooth, calming and very well thought out. The AI logic works beautifully and communication throughout the project was excellent. Highly recommended!
Raton delivered a stylish, well-structured AI mobile app within the promised timeline. The UI feels modern, and the AI recommendations work smoothly. I enjoyed the meeting time also. He enlightened me in so many ways. He is a great developer who is very polite and humble and respects his client at all times.
Working with Raton was an excellent experience. The AI Agent came out far better than I expected. The features, speed, and UI quality are impressive. Everything was delivered on time, and communication was smooth. Highly recommended!
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