I Will Build Your AI-Powered Mobile App or Chatbot

You have an idea. Maybe it's a GPT-powered chatbot, an AI-enhanced mobile app, or a prototype you've built with vibe coding that needs professional engineers to take it to production. Whatever stage you're at, you need a team you can trust to deliver something real — not a patchwork of freelancers, but a cohesive in-house build with quality assurance baked in from day one.

That's exactly what Zinn Digital brings to every project.

Based in London, the Zinn Digital team combines developers, designers, and QA specialists to deliver end-to-end AI app development — from initial architecture through to a fully functional, store-ready product. With over eight years of professional experience leading projects, the team builds on proven frameworks and modern AI tooling to give your product a competitive edge.

**What you get with every package:**
Every tier includes functional iOS and Android apps built on Flutter or React Native, AI model integration and fine-tuning using GPT-5 or OpenAI APIs, chatbot integration, user authentication, and the complete source code handed over to you at delivery. You are never left with a black box — the product is yours.

**Who this service is for:**
This is ideal for startups validating their first AI product, established businesses looking to automate workflows through intelligent mobile tooling, founders with a prototype who need a production-grade rebuild, and teams that want custom LLM-backed features embedded into a cross-platform app.

**The technology:**
The team works across a modern, scalable stack — Flutter, React Native, and FlutterFlow on the frontend; Node.js, Firebase, Supabase, AWS, and GCP on the backend and cloud; and GPT-5, OpenAI, and custom LLM training on the AI layer. Every choice is made to ensure your app is maintainable and ready to scale.

**UI/UX design:**
Standard and Premium tiers include full application and interface design. If you already have mockups or brand assets, they'll be incorporated. If not, the team designs screens, icons, and the splash screen as part of the package.

**App store submission:**
The team can prepare and submit your app to the App Store and Google Play, including certificates and store listings, so you don't need to navigate that process alone.

**After delivery:**
You receive 90 days of free bug-fix support following handover. For ongoing maintenance, feature additions, or longer-term collaboration, a tailored maintenance arrangement can be discussed via order chat.

Regular progress updates are provided throughout the build — daily or every few days depending on scope — so you always know exactly where the project stands.