T-Matrix
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Build · App Development

Apps from first prototype to the app stores.

Mobile, desktop and web apps, from a clickable prototype to an MVP and a product that scales.

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Who it is for

Sounds familiar?

For startups, companies with mobile customers and internal teams.

  • You have an idea and need a first working version fast and on budget.
  • The current app is old, slow or breaks with every OS update.
  • Two separate apps for iOS and Android cost twice to maintain.
  • Nobody owns the backend, hosting and releases.

What we do

12 ways we help

  • iOS & Android Apps

    Native apps in Swift and Kotlin.

  • Cross-Platform Apps

    One app for both platforms with React Native, Flutter or Capacitor.

  • Progressive Web Apps

    Runs in the browser and installs on the phone without an app store.

  • Desktop Apps

    Programs for Windows, macOS and Linux with Electron or Tauri.

  • MVP for Startups

    From idea to a first working version in weeks: research, prototype, MVP.

  • SaaS Product Development

    The full subscription product: billing, roles, analytics and scaling.

  • UX/UI Design

    User research, prototypes, a design system and screens.

  • Backend & Cloud Architecture

    Servers, APIs and EU clouds: Hetzner, IONOS, OVH, AWS Frankfurt.

  • Games & Gamification

    Casual games, Telegram Mini Apps and game mechanics inside products.

  • App Store Launch & ASO

    Publishing in the App Store and Google Play, and optimising the store page.

  • Maintenance & Scaling

    Support, OS updates, growing traffic and monitoring.

  • Legacy Modernization

    Moving old apps to a modern stack without stopping the business.

How we work

From first call to running.

  1. 01

    Discover

    One call and one written brief. We tell you what to build, what to skip and what it costs.
  2. 02

    Design

    A clickable design in your brand, tested on real screens before any code.
  3. 03

    Build

    Weekly releases you can open in the browser, not status reports.
  4. 04

    Launch

    Legal pages, speed, accessibility and tracking are checked before go-live.
  5. 05

    Support

    EU hosting, updates, backups and a support contract with fixed response times.

What you get

Results, not activity.

  • A working version early

    You test with real users before the big budget is spent.

  • One codebase where it fits

    Cross-platform when it saves money, native when the app needs it.

  • Data stays in the EU

    Backend and storage on EU servers by default.

  • Releases without drama

    Store publishing, updates and monitoring are part of the plan.

Technology

Tools we work with.

We pick tools for your case, not the other way round. EU hosting by default.

  • Swift
  • Kotlin
  • React Native
  • Flutter
  • Capacitor
  • Electron
  • Tauri
  • Node.js
  • PostgreSQL
  • Hetzner
  • IONOS
  • OVH
  • AWS Frankfurt

Pricing

Prices start where you see them.

The entry price is a real price for the simplest standard version, not a teaser.

  • UX/UI designfrom €3,900
  • MVPfrom €14,900
  • Cross-platform appfrom €29,900

All prices excl. VAT. MVP on one platform or as a PWA, in 6–8 weeks. You get a fixed quote after one call.

How you pay

  • Fixed price for design and MVP
  • Time and materials after launch
  • Dedicated team
Get a fixed quoteSelected work by our team

Related

Often combined with.

FAQ

Questions we hear often.

Native or cross-platform?
Cross-platform is cheaper to build and maintain and fits most business apps. Native is worth it for heavy graphics, deep device features or very high performance. We recommend one in the brief.
Can you take over an existing app?
Yes. We start with a short code and architecture review, then plan updates or a step-by-step modernisation.
Who publishes the app in the stores?
We do, under your developer accounts, so the app always belongs to you.

Tell us what
to build.

Get a quote
hello@t-matrix.net

We reply within one business day.