Kuroko SystemsConsult

Web & Mobile Apps

Applications that survive first contact with real users

Custom web applications, iOS and Android, and a first version for startups — with authentication, permissions, and an architecture that holds as usage grows.

What's included

  • Custom web applications
  • Mobile apps for iOS and Android
  • MVP for startups — from an idea to a first product
  • Authentication, permissions, and user management
  • Modernising an existing system, in stages rather than all at once
  • Architecture that holds as usage grows

The opportunity

Most software is not held back by a lack of ideas — it is held back by code that stops being runnable the moment it leaves the demo. The application worth paying for is the one still working, loading, and scaling long after launch.

Web and mobile applications sit at the center of how a business sells, serves, and operates. When they are reliable, accessible, and fast, they become a quiet advantage: fewer support tickets, happier users, and a team that trusts its own product.

Our approach

We work in product thinking first: the job the software has to do and the conditions it has to survive. Only then do we touch a code editor.

Senior UX and engineering sit in the same loop, so the interface and the architecture are designed as one thing. We build accessible interfaces, real authentication, clean APIs, and performance budgets — the production rails most prototypes never get.

We ship, measure, and keep hardening. The code is written to be read by whoever picks it up next.

Business outcomes

A dependable product that loads fast, works across devices, and can be maintained and extended without a rewrite.

A lower cost of change, because the tests say what a new feature broke before your users find it.

Common questions

How long does it take to build an application?

By scope. We work in sprints, so you see something running within the first weeks and every week after that rather than waiting for a reveal at the end — which is also what keeps the estimate honest as the work goes on. You get a real estimate once we have scoped the project together.

What decides the price?

Scope, mostly: how many screens, how many integrations, whether it needs mobile as well as web, and how much has to be built rather than configured. We scope it with you first and quote against that, so the number has a reason behind it.

Who owns the code?

You do — first line to last, including the documentation and full access to the repository. You are not locked in, and that is deliberate.

Do you keep maintaining it after launch?

Yes, through ongoing maintenance and development, but you are never obliged to. It is your code; if you want to take it in-house or elsewhere, we hand it over properly.

Web or mobile — which do we need?

It depends on where your users are and what the app has to do. A web app is often enough and reaches everyone without an install; a native app earns its cost when you need the device itself, or when people open it every day. We will tell you which one we think you need, including when the answer is the cheaper one.

We have an old system. Can it be upgraded instead of rebuilt?

Usually, yes. We move it onto current technology in stages, keeping it running throughout, rather than stopping everything for a rewrite. Where a rebuild really is cheaper than the repair, we say so.

Worth reading first

The tools

We work inside what you already have

Some of what we build with and connect to. The list grows with whatever our clients already run on, so anything missing here is still worth asking about.

  • Next.js
  • React
  • TypeScript
  • Tailwind
  • Node.js
  • Python
  • Flutter
  • GraphQL
  • PostgreSQL
  • MongoDB
  • Supabase
  • Firebase
  • Docker
  • Git
  • Vercel
  • Cloudflare
  • Anthropic
  • Hugging Face
  • LangChain
  • n8n
  • Make
  • Zapier
  • HubSpot
  • Zoho
  • Airtable
  • Notion
  • Stripe
  • Shopify
  • WordPress
  • WhatsApp
  • Telegram
  • Gmail
  • Sheets
  • Analytics
  • Figma

Ready to scope this engagement?

Tell us the shape of the problem and you get back scope, risks, and a recommended engagement.

Talk about your application