Cross-platform app development
From idea to the App Store, with one team.
Cross-platform app development lets you build one app for iOS, Android, macOS, Windows and ChromeOS from a single codebase, cutting costs and time. At Somia Digital we guide businesses in Girona, Barcelona and the Costa Brava from product definition to publishing on the App Store and Google Play — handling everything, including store approval.
App development
We bring your idea to life: apps for iOS, Android and desktop from a single codebase, published to the app stores and with post-launch support.
Results
10+
Years of digital experience
5
Platforms from one codebase
100+
Projects delivered
How do we develop your app?
01
Product definition
We turn your idea into a concrete plan: features, users, platforms and business model. We prioritise what truly adds value.
- Key features
- Roadmap
- Fixed quote
02
Interface design
We design an attractive, easy-to-use interface following Apple's and Google's guidelines so the app feels native on every platform.
- Clickable prototypes
- Apple & Google guidelines
03
Cross-platform development
We build for iOS, Android, macOS, Windows and ChromeOS: with a single codebase your app reaches every screen with lower maintenance costs.
With more than 10 years' experience, we combine technical rigour with a passion for innovation.
- iOS & Android
- Single codebase
- Desktop included
04
Testing and publishing
We test the app thoroughly on real devices and handle the full App Store and Google Play setup and approval — you don't need to worry about a thing.
- App Store
- Google Play
- Real-device testing
05
Post-launch support
After launch we stay by your side: updates, new features and compatibility with new iOS and Android versions.
- Updates
- New features
- Monitoring
Which technologies do we work with?
Flutter
React
Firebase
Android
Apple• Businesses and artists that already trust us
Who has trusted us?
From start-ups to global organisations: we work with all kinds of businesses.
I built my website with the Somia Digital team and the result is a very pleasant, functional site. Thank you for your interest and dedication!
My experience was excellent! Congratulations to the team behind it!
We were looking for an agency in Girona to build our website and advertise our business. The Somia Digital team did a great job, thank you!
Which apps have we built?
Frequently asked questions about app development
Can't find your question? Tell us about your case and we'll reply within 24-48 working hours.
Request a quoteLast updated: 4 July 2026
An app's cost depends on features, platforms and integrations: a simple MVP costs far less than an app with accounts, payments and a backend. We define the scope with you and give you a fixed quote — no surprises.
If your goal is to be found and inform, a website is usually more cost-effective. An app makes sense when you need push notifications, frequent use, offline access or device features (camera, GPS). We'll advise you honestly: if you don't need an app, we'll say so.
Yes, we handle everything: developer accounts, store listings, screenshots, reviews and approval. Your app goes live and ready to download.
It depends on the scope: a simple MVP is ready sooner than a full app with a backend and user accounts. We give you the timeline along with the quote and, before launch, we present the app to you and make the agreed changes.
Got an app in mind? Let's work out a quote.
Tell us about your case in a few questions and we'll prepare a tailored quote. If you prefer, let's talk on WhatsApp.
Message us on WhatsAppTailored quote
Request a quoteWhat else can we do for your website?
Other services inWeb & Software
- Web designWe design professional websites, online stores and custom builds that turn visits into customers. Fast, mobile-first and, on every website plan, with SEO included.
- Online storesWe build online stores that are easy to use, secure and built to convert: catalogue, payments and shipping ready so you can start selling from day one.
- Domains & hostingWe register your domain, host your website on fast servers and set up your professional email. All managed by us, so you never have to worry.
- SEOWe make you show up in search engines for the searches your customers make: audits, content, links and local SEO with constant tracking and measurable results.
- GEO (AI)We work so that ChatGPT, Gemini, Perplexity, Claude and Google's AI answers can cite you when someone asks about what you offer: quotable content, structured data, real authority and regular citation tracking.
- AI chatbotAn assistant that answers your visitors using your website's own content, knows which page they are on and collects leads with their consent. Only for new websites we build ourselves.
What have we written about it?
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