Skip to main content
Voltra
FR

Mobile app

A mobile app built for your users, not for a spec sheet

A successful mobile app solves a real need, loads fast, and makes people want to come back. We build custom apps in React Native — one codebase for iOS and Android — from idea to MVP through store publishing, with an architecture designed to grow without a full rebuild. An independent studio based in Fleurus, Belgium, we build for companies in Charleroi, Namur, Mons and across Wallonia.

See our work
  • One codebase, two platforms: iOS and Android
  • MVP in a few weeks to validate your market
  • Guided App Store and Play Store publishing

The problem

What a poorly prepared app costs you

A poorly scoped mobile app costs twice: once to build it, and again to rebuild it properly.

Our answer

From MVP to an app built to last

Every app we deliver is built to validate your market fast, then evolve without a full rebuild.

  • React Native: one codebase, two platforms

    A single codebase for iOS and Android reduces development and maintenance costs, without compromising on smoothness or access to the phone's native features.

  • MVP designed to validate fast

    We work with you to identify the core feature and build an MVP around it, so you can test your market in a few weeks, not several months.

  • App Store and Play Store publishing handled

    Developer accounts, store compliance, product listings and screenshots: we support every step until the app is available for download.

  • Notifications and engagement built in

    Push notifications, deep linking, onboarding screens designed to bring users back and turn a first download into regular use.

  • Architecture ready to grow

    Code structured and documented from the start, so you can add features later without rebuilding everything. The delivered code is entirely yours.

  • Maintenance and updates

    An optional maintenance plan keeps your app compatible with new iOS and Android versions, and fixes issues before they affect your users.

Process

From call to launch in 4 steps

  1. 01

    Discovery

    A workshop to define your MVP's core feature, your target users and technical constraints. Firm quote within 48h.

  2. 02

    Design

    Mockups of key screens and the user journey, designed for iOS and Android standards. Two rounds of revisions included.

  3. 03

    Development

    React Native development, necessary integrations (payment, notifications, API), testing on real devices. Tracked via a shared test build.

  4. 04

    Publishing & follow-up

    Store submission, review support, admin training. Then 30 days of included bug-fix warranty.

Budget

How much does a custom mobile app cost?

A firm price after scoping. The range depends on the number of screens, required integrations, and feature complexity.

from

€6,900

Prices exclude VAT. Custom mobile MVP for iOS and Android, store publishing included. Free detailed quote within 48h.

  • Dedicated iOS and Android UX/UI design
  • Custom React Native development
  • App Store and Play Store publishing
  • Push notifications and API integrations
  • 30 days of included bug-fix warranty
Get a free quote

FAQ

Your questions about mobile apps

A custom mobile MVP starts at €6,900 excl. VAT for an app with essential features on both iOS and Android. A more complete application — integrated payment, custom backend, advanced features — generally falls between €11,000 and €25,000. The firm quote is delivered within 48h after scoping your exact needs.

React Native lets you build once for iOS and Android, with near-native performance for the vast majority of apps. Separate native development is mainly justified for very specific use cases — demanding 3D games, intensive processing. For most business and consumer projects, React Native cuts cost and timeline with no visible compromise.

An MVP (minimum viable product) includes only the features essential to testing your idea with real users. It lets you validate demand before investing in advanced features, and adjust the product based on real feedback rather than assumptions. It's the most cost-effective way to limit the risk of a failed launch.

An MVP typically takes eight to twelve weeks, from scoping to store publishing. A more feature-rich app takes three to five months. Apple's review process can add a few extra days, which we factor into planning to avoid surprises at launch.

We manage the entire process: creating or using your developer accounts, preparing product listings, screenshots, privacy policy, and submission under Apple and Google's review rules. You stay the owner of the accounts and the app; we handle the technical and administrative side.

You get 30 days of included bug-fix warranty after publishing. After that, an optional maintenance plan covers compatibility with new iOS and Android versions, bug fixes and new features. The code stays yours, documented and retrievable at any time, with or without us.

Blog

Further reading

Our commitments, in writing

  • Quote within 48h

    A detailed, firm estimate — not a vague range.

  • Code delivered, code you own

    You walk away with the full Git repository. No hidden dependencies.

  • Maintenance covered

    Fixes, updates, and monitoring after launch.

  • Revisions included

    Every phase includes planned rounds of feedback in the quote.

Your idea deserves a well-built app

Describe your project and your target users: a detailed, firm quote within 48h, free.

Chat on WhatsApp

Response within 24h