APP DEVELOPMENT
As an app development company, we build custom web and mobile apps that solve real business problems. From internal portals to customer-facing products – we build applications that perform, scale and stand the test of time.
EVERYTHING YOU NEED FOR A MODERN APPLICATION
We don't just build apps – we build digital products that drive business. Every project starts from your users' needs and is optimised for performance, security and scalability from day one.
Web apps
Tailor-made web applications in Next.js for SaaS, customer portals and dashboards.
Mobile apps
Cross-platform apps in React Native, or native iOS in Swift when performance demands it.
Internal tools
Tailor-made dashboards and admin panels that replace Excel and manual processes.
MVP development
Fast prototypes and MVPs to validate ideas before a full investment.
Redesign
Redesign of existing websites with a focus on UX, speed, conversion and preserved SEO value — we plan redirects and the technical foundation before the first pixel moves.
Maintenance
Ongoing technical maintenance, security updates and content changes — including performance monitoring so that Core Web Vitals hold up over time.
FROM IDEA TO LAUNCH
Strategy & brief
We map your users, business goals and technical requirements in a kick-off meeting. The result: a clear product brief and project plan.
Design & prototype
We design in Figma with your brand guidelines as the foundation. You approve a clickable prototype before development starts.
Development
We build with modern frameworks such as Next.js, React Native or Swift depending on the platform. AI-assisted development is our standard – Claude and an MCP server speed up boilerplate, tests and documentation so that we can spend more time on architecture and product decisions.
Testing & QA
Thorough testing of functionality, performance, security and cross-device compatibility before launch.
Launch
We handle deployment, App Store publishing and hosting. You get training in managing the app and a plan for further development.
TOOLS WE WORK WITH
We choose tools for what the project needs — not for what is fashionable. Every technology in our stack is chosen for performance, scalability and long-term maintainability.
framework
Next.js
React's production standard — server rendering, edge rendering and full SEO support. The foundation of all our headless websites and web apps.
language
Typescript
Type-safe JavaScript that catches errors before they reach production — standard in all our development projects.
hosting
vercel
Edge hosting with a global CDN and CI/CD straight from GitHub — Next.js's production environment, where performance is the default, not an add-on.
design
figma
Collaborative design and prototyping, from concept to handoff.
framework
React Native
Cross-platform framework for native iOS and Android apps with a shared codebase.
language
Swift
Apple's language for native iOS development, when maximum performance and system integration are required.
framework
Expo
Toolchain for faster React Native development, with over-the-air updates and simpler deployment.
backend
Supabase
Postgres-based backend with authentication, real-time features and file storage out of the box.
database
PostgreSQL
Robust relational database for applications that need complex data logic and scalability.
API
tRPC
Type-safe APIs between client and server without code generation — ideal for Next.js apps.
authentication
Clerk
Ready-made authentication with social login, MFA and user management — cuts development time significantly.
monitoring
Sentry
Real-time error tracking and performance analysis for web and mobile apps.
THE RIGHT TECHNOLOGY FOR THE RIGHT PROJECT
The choice of technology affects everything from development time and performance to the cost of ongoing maintenance. We always recommend the architecture that fits your specific goals.
| Criterion | Next.js + tRPC | React Native + Expo | Native iOS (Swift) | No-code (Bubble/Glide) | WordPress + plugins |
|---|---|---|---|---|---|
| Performance | |||||
| Design freedom | |||||
| Scalability | |||||
| App Store publishing | |||||
| Cross-platform | Web | iOS, Android, web | iOS only | Web | Web |
| Maintenance | Low | Low | Medium | Very low | High |
| Best suited for | SaaS, customer portals, dashboards | Consumer apps, MVP | Advanced native features | Internal tools, prototypes | Simple CRUD apps |
Ratings based on SEOS’s internal assessment. Outcomes vary with the implementation.
Questions & answers
How long does an app project take?
Most projects take 8–20 weeks depending on scope. An MVP can be ready in 8 weeks, while a more complex app with several integrations takes longer.
Which platforms do you build for?
We build web apps in Next.js, mobile apps in React Native (for both iOS and Android) and native iOS apps in Swift when maximum performance is required.
What does it cost to develop an app?
In Sweden in 2026, market prices range from around SEK 40,000 for a simple app to SEK 500,000 or more for a complete business app – but with AI-assisted development and a well-defined first version, many projects come in well below the traditional levels. The full cost picture, including maintenance and App Store fees, is covered in the guide What does app development cost?
Are design and UX included?
Do you offer maintenance after launch?
Yes. We offer ongoing maintenance agreements that include security updates, bug fixes, further development and technical support.
Can you rebuild our existing app?
Absolutely. We carry out a technical audit of your current app and draw up a modernisation plan that preserves functionality and improves performance and user experience.
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