Get a production-ready AI-powered web app, mobile app or chatbot — built with RAG, LLM integration, multi-language support and clean source code by a London-based AI development studio.
I Will Build Your AI Web App, Mobile App or Chatbot
Core AI integration with RAG, CRM connectivity, authentication and source code — ideal for a focused MVP or chatbot.
- Retrieval-Augmented Generation (RAG) integration
- Pre-set conversational journey design
- CRM / database integration
- User authentication
- Multi-language support
- Full source code delivered
Everything in Basic plus a fully integrated LLM model for richer, more capable AI behaviour — suited to more complex apps.
- Everything in Basic AI Build
- AI LLM model integration (e.g. OpenAI GPT)
- Extended conversational capability powered by LLM
- Retrieval-Augmented Generation (RAG) with LLM layer
- Multi-language support with LLM-enhanced responses
- Full source code delivered
The complete solution — full-scope AI web or mobile app with LLM integration, complex workflows and maximum delivery time for larger builds.
- Everything in Boost AI Build
- Full-scope AI web app or mobile app (Android and/or iOS)
- Complex workflow and automation design
- Advanced CRM / database architecture and integration
- Comprehensive multi-language and multi-user support
- Full source code delivered with clean, maintainable structure
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Value Position
Tech Stack
AI Capabilities
Delivery & Revisions
Base Inclusions
What You'll Receive
Full Description
If your business needs a genuinely intelligent digital product — one that understands users, automates conversations and integrates with your existing data — this service delivers exactly that.
Led from London, England, this is an AI-first development studio with roots stretching back to the earliest wave of mainstream AI curiosity. The founder discovered AI through independent research, pursued it through online courses and workshops, and has since grown into leading development teams building real-world AI applications. The work spans AI agents, custom GPT-powered apps, retrieval-augmented generation (RAG) systems, AI chatbots, LLM integrations, and full-stack mobile and web development for Android and iOS.
Every project is built with a clear philosophy: powerful under the hood, intuitive on the surface, and maintainable long after handover.
**What you receive on every tier:**
Retrieval-Augmented Generation (RAG) connects your AI to your own knowledge base or documents, so it answers with accuracy rather than hallucination. A pre-set conversational journey shapes how users move through the experience. CRM and database integration means the app talks to your existing systems. User authentication keeps access secure. Multi-language support opens your product to global audiences. Full source code is delivered on every single tier — no lock-in, no black boxes.
**How it works:**
After you place your order, share your project brief via the order chat. The studio reviews your requirements, confirms scope, and gets to work. You are kept updated throughout, and revisions are built into every package to ensure the final product is exactly right.
**Who this is for:**
Startups wanting to launch an AI-powered MVP. Businesses looking to add an intelligent chatbot or assistant to an existing platform. Product teams who need a full-stack developer experienced in Flutter, Dart, React.js, Next.js, Node.js and Express.js. Anyone who wants AI that genuinely works — not a generic template bolted onto an API key.
**The technology stack:**
Design is prototyped in Figma. Apps are built on Flutter and Dart for cross-platform mobile (Android and iOS), with React.js and Next.js on the front end and Node.js with Express.js powering the back end. AI capabilities are built using OpenAI's ecosystem and can include fine-tuned or integrated LLM models on the higher tiers.
Professional, prompt communication is a given. Every solution is tailored to your specific needs — there are no copy-paste builds here.
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Compare Packages
| Feature | Basic AI Build | Boost AI Build | Premium AI Build |
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 21 days |
| Revisions | unlimited | unlimited | unlimited |
| Retrieval-Augmented Generation (RAG) integration | ✓ | ✕ | ✕ |
| Pre-set conversational journey design | ✓ | ✕ | ✕ |
| CRM / database integration | ✓ | ✕ | ✕ |
| User authentication | ✓ | ✕ | ✕ |
| Multi-language support | ✓ | ✕ | ✕ |
| Full source code delivered | ✓ | ✓ | ✕ |
| Everything in Basic AI Build | ✕ | ✓ | ✕ |
| AI LLM model integration (e.g. OpenAI GPT) | ✕ | ✓ | ✕ |
| Extended conversational capability powered by LLM | ✕ | ✓ | ✕ |
| Retrieval-Augmented Generation (RAG) with LLM layer | ✕ | ✓ | ✕ |
| Multi-language support with LLM-enhanced responses | ✕ | ✓ | ✕ |
| Everything in Boost AI Build | ✕ | ✕ | ✓ |
| Full-scope AI web app or mobile app (Android and/or iOS) | ✕ | ✕ | ✓ |
| Complex workflow and automation design | ✕ | ✕ | ✓ |
| Advanced CRM / database architecture and integration | ✕ | ✕ | ✓ |
| Comprehensive multi-language and multi-user support | ✕ | ✕ | ✓ |
| Full source code delivered with clean, maintainable structure | ✕ | ✕ | ✓ |
Extra Information
Why Choose Me
Tools I Use
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Frequently Asked Questions
The more detail the better. Ideally share a brief describing what the app or chatbot should do, who the end users are, which platforms you need (web, Android, iOS), any existing systems it needs to connect to (CRM, database), and any design preferences. If you are unsure, simply share what you have and the team will ask follow-up questions via the order chat.
RAG allows the AI to pull information from your own documents, knowledge base or database before generating a response. This means the AI answers accurately based on your specific content rather than relying solely on a general model. It is included on every tier and is particularly valuable for customer support bots, internal tools and any app where accuracy matters.
The Basic tier provides a fully functional AI integration with RAG, conversational flows, CRM connectivity, authentication and multi-language support. The Boost tier adds a full AI LLM model integration (such as OpenAI GPT), giving the application significantly richer natural language understanding and generation capabilities. If you need the AI to converse freely and intelligently — not just follow pre-set paths — Boost or Premium is the right choice.
Yes. Full source code is included on every single tier — Basic, Boost and Premium. You own the code outright and can maintain, extend or hand it to another developer at any point.
Mobile apps are built with Flutter and Dart, supporting both Android and iOS from a single codebase. Web applications use React.js and Next.js on the front end, with Node.js and Express.js on the back end. UI/UX is prototyped in Figma. AI capabilities are built on OpenAI's ecosystem.
Unlimited revisions are included on all tiers. Revisions cover adjustments to the delivered scope — changes to logic, UI, conversational flows or integrations as originally agreed. Significant scope additions (entirely new features not in the original brief) may require a separate arrangement discussed via the order chat.
Yes. Using Flutter and Dart, the codebase is cross-platform by nature, meaning both Android and iOS are supported from the same project. Please confirm your target platforms in your project brief when you place the order.
Source code is delivered via a cloud link (such as a version-controlled repository). Any supporting documentation or files are shared through the order manager. Installation or deployment guidance is included where relevant.
Customer Reviews
See what our customers say about this Zinn
Great experience from start to finish. They handled everything smoothly and delivered solid results without any hassle. Would happily work together again.
Outstanding work on our mobile app project. The developer understood our requirements quickly and delivered a polished, high-quality app. Highly recommended for anyone looking for professional mobile app work.
A dedicated and professional developer who is always willing to go above and beyond. Clear and efficient communication regarding technical objectives and difficulties is highly recommended.
Absolutely outstanding custom frontend work! Delivered a clean, modern, and fully responsive interface exactly as requested. Excellent communication and incredible value.
I had a great experience working with Rakibul and his team on my mobile app. They handled all the development tasks efficiently and were very flexible with any updates or changes I requested. Communication was smooth, and the final delivery was exactly what I expected. I look forward to working with them again in the future.
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