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01Services

Mobile app development

We build iOS and Android apps that are fast, stable and pleasant to use — and we know how to get them through store review. We work in Flutter, so one codebase covers both platforms, and the web and desktop when needed.

  • iOS
  • Android
  • Flutter
  • Firebase
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01What you get

What you get

  • 01

    UI design and prototype

    A clickable prototype before development, so decisions are made on screen, not in production.

  • 02

    iOS and Android from one codebase

    A Flutter app with near-native performance and one team for both platforms.

  • 03

    Backend and API

    Sign-in, database, notifications and admin — everything the app needs behind the screen.

  • 04

    Notifications and analytics

    Push notifications, crash reporting and usage analytics from day one.

  • 05

    Store release

    Screenshots, listings and the technical submission — and getting through Apple and Google review.

  • 06

    Maintenance and new versions

    Updates for new iOS and Android versions, new features and support after launch.

02Process

Four steps to your app

  1. 1. Discovery and plan

    We talk about goals, users and constraints. The result is a specification with priorities, an estimate and a delivery plan.

    • Workshop
    • Specification
    • Estimate

  2. 2. Design and prototype

    We test the interface and user flows on a clickable prototype before the first line of code.

    • UX flows
    • Design system
    • Prototype

  3. 3. Iterative development

    We ship in short cycles, with automated tests and continuous integration. You see progress regularly, not just at the end.

    • Iterations
    • Tests
    • CI/CD

  4. 4. Launch and growth

    Store release, error and performance monitoring, new versions. Launch is the beginning, not the end.

    • Release
    • Monitoring
    • Maintenance

03Technology

  • Flutter
  • Dart
  • Riverpod
  • Firebase
  • RevenueCat
  • Sign in with Apple
  • Google Sign-In
  • OpenStreetMap
  • FastAPI

04From our workshop

From our workshop

Mobile app · Price comparison

Cjenko

Compare product prices and whole baskets at stores that suit you. Barcode scanning, shopping plans and price-drop tracking come together in a simple mobile app.

Case study →

Cross-platform app · Music

Songware

Live sets keep the whole band in sync, while set presentations put lyrics on an external TV or projector for the audience. Repertoire, setlists, recordings and conversations come together in the same app.

Case study →

05Questions

Questions

Why Flutter instead of separate native apps?

Flutter lets us cover iOS and Android with one codebase and near-native performance. That means faster development, fewer bugs and lower maintenance costs. It is how Songware runs on six platforms and Cjenko on iOS and Android.

How long does it take to build a mobile app?

It depends on the scope. A simple MVP can be ready in a few weeks, while more complex products grow over several months and iterations. After we get to know the project you get a plan with phases and an estimate.

Do you help with releasing on the App Store and Google Play?

Yes. We prepare everything the stores ask for — screenshots, descriptions, previews and the technical submission — and guide the app through Apple and Google review. Cjenko and Songware have both been through it on both stores.

What about maintenance after launch?

Apps need regular updates as new versions of iOS and Android ship. We maintain our own apps every day, so we know exactly what it takes — and we offer the same for yours.

4sourceContact

Got an idea? Let’s build it.

Tell us briefly what you are building — or just the problem you want solved. We will get back with questions and a suggested next step.

Write to us

Write to us