01 / Mobile

Mobile app development for iOS and Android

An app that someone opens on their phone every day has to be fast, easy to use and not break after the first system update. We design, build and publish mobile apps, and then make sure they keep working.

Scope

In short: what we do

01

UX/UI design and prototype

A clickable prototype is ready before the first line of code. You check screens and flows on your phone before the project goes into development.

02

Native or cross-platform

Swift and Kotlin when performance and full access to device features matter. React Native when one codebase should serve both iOS and Android.

03

Backend, API and admin panel

Sign-in, payments, push notifications, data sync and an admin panel for managing content.

04

Release and growth

We take the app through App Store and Google Play review, and after launch we look after updates, fixes and new features.

What kind of mobile apps we build

  • Customer-facing apps – bookings, orders, loyalty programmes, customer accounts and status notifications.
  • Internal apps – for field staff, service, warehouse or sales teams: forms, photos, signatures, offline work.
  • New products and startups – a first version (MVP) that lets you test the idea with real users before you invest in the full scope.
  • Apps connected to other systems – maps and location, payments, camera, Bluetooth, integrations with the systems you already use.

Native or cross-platform?

There is no single right answer – it depends on what the app has to do, who it is for and what the budget is.

React Native means one codebase for iOS and Android. It usually means a shorter timeline and a lower cost of shipping the app on both platforms, and for most business apps it is more than enough.

Native apps (Swift and SwiftUI on iOS, Kotlin and Jetpack Compose on Android) are our choice when maximum performance, smooth animations, advanced device features or tight system integration – such as widgets or background work – are key.

We advise during the analysis stage, taking into account the budget, the deadline and how the app should grow over the next year or two.

What the process looks like

  1. Conversation and analysis – the app's goal, its users, the scope of the first version and what can be simplified.
  2. Design and prototype – wireframes and a clickable prototype you can try on your own phone.
  3. Development in short iterations – you get a test version from the first weeks (TestFlight on iOS, internal testing in Google Play), so progress is visible all the time.
  4. Testing and release – testing on real devices, store descriptions and screenshots, getting through Apple and Google review.
  5. Maintenance and growth – updates for new iOS and Android versions, error monitoring, fixes and new features.

An app often also needs a panel for managing content, users or orders. We build that panel as a web app connected to the mobile app through a shared API.

What the cost of a mobile app depends on

  • the number of screens and user roles (e.g. customer, employee, administrator),
  • whether the app needs its own backend and admin panel,
  • integrations: payments, maps, company systems, external APIs,
  • one or two platforms and the chosen approach – native or cross-platform,
  • requirements for offline work, security and the number of users.

That's why we start with a conversation. After a few sentences of description we reply with questions, a proposed scope and a price range. We often suggest a smaller first version (MVP) that reaches users sooner and lets you develop the app based on real data rather than assumptions.

FAQ

Frequently asked questions

Will the app work on both iOS and Android?

Yes. With React Native one codebase serves both platforms. If the project calls for native apps, we build separate versions in Swift and Kotlin. We decide which approach to take during the analysis stage.

Do you help publish the app in the App Store and Google Play?

Yes. We prepare the descriptions, screenshots and required information, set the app up in the stores and take it through review. The developer accounts are best registered to your company – that way the app belongs to you from day one.

How long does it take to build a mobile app?

It depends on the scope. Simpler apps and first versions (MVPs) usually take a few months, larger systems are built in stages. You get a schedule with the individual stages together with the quote.

Can you continue developing an app someone else built?

Yes. We start with a review of the code and infrastructure, and then tell you straight whether it's worth developing the current solution or whether part of it needs to be rebuilt.

Can the app have a panel for managing content?

Yes. We build the admin panel as a web app that runs in the browser – you can use it to manage content, users, orders or notifications.

From the blog

Guides: mobile apps

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Contact

Got a project? Get in touch

A few sentences about your idea, a rough deadline and budget are enough to start. The first conversation and the initial quote are free and non-binding.

secure_channel ONLINE
> contact --topic "mobile apps"
send an email, we'll reply with questions and a proposed next step [OK]
biuro@app4mobile.pl