App Development for iOS and Android

We build complete, data-driven mobile apps for iOS and Android, backed by 10+ years of experience.

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100+
Projects delivered with precision, experience and technical expertise
2-4
Months to MVP launch
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10+
Years of proven industry success and experience

A Complete Solution for modern apps

Mobile App Development

Build fast, user-friendly apps for both iPhone and Android.

React Native Apps
Native iOS and Android
Apps for Mobile and Tablet
Push Notifications and Offline Support

Backend & Cloud Services

A robust technical foundation that can scale with your product.

API Development
Databases and User Accounts
Firebase and Cloud Services
Administration and Permissions

Integrations

Connect your app to the systems and services your business already uses.

BankID and Swish
Payment Solutions
CRM and ERP Systems
External APIs and Data Sources

Launch & App Management

We help you bring your app to market and continue developing it after launch.

App Store and Google Play
Testing and Quality Assurance
Monitoring and Error Management
Support and Ongoing Development

Trusted by clients in Sweden, EU and the US

Built on expertise. Driven by innovation. We deliver precision, reliability and growth through both native and cross-platform solutions.

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What's included when we build your app?

We deliver everything required to take your mobile app from concept to launch.

Design & UX

We create user flows, wireframes and a polished design that makes your app clear, attractive and easy to use.

1

Native & Cross-platform

iOS with Swift, Android with Kotlin or React Native. We recommend the solution that best fits your budget and timeline.

2

Integrations

BankID, Swish, Stripe, ERP systems and CRM platforms. We connect your app to your existing infrastructure.

3

Backend & API

We build a scalable technical foundation with server architecture, databases, APIs and user accounts that will support your growth.

4

Launch, Operations & Ongoing Development

We handle App Store and Google Play publishing, as well as monitoring, maintenance and continued development.

5

Why build a cross-platform app?

A single codebase for iOS and Android saves time and budget.

A consistent UI/UX with a native feel across every platform.

Hot reload speeds up development and testing.

Scalable architecture simplifies maintenance and long-term development.

Over-the-air updates enable faster releases and bug fixes.

AI-based training recommendations in the TrackFellow app for personalized dog training and mantrailing

How do we create outstanding apps from concept to launch?

Consistently building modern, high-performance React Native apps requires established and clearly defined processes. From design concept to launch, we focus on your customers' needs and create solutions that deliver the best possible end-user experience.

Step 1 - Discovery

During discovery, we lay the foundation for the project by understanding your goals, needs and circumstances.

Key activities:

  • Understand business objectives and the target audience
  • Run stakeholder workshops
  • Define the project scope and priorities
  • Analyze competitors

Step 2 - Design

During the design phase, we shape a thoughtful and scalable solution that combines clear architecture, a strong user experience and visual identity.

Key activities:

  • Analyze the architecture for suitability, scalability and best practices
  • Leverage React Native's capabilities to create distinctive designs
  • Create design concepts and a clickable prototype for user testing
  • Gather feedback and refine the solution

Step 3 - Development

During the development phase, we build a robust and scalable codebase with clear architecture, automated testing and efficient delivery workflows.

Key activities:

  • Modular and scalable React Native code
  • Clean and flexible architecture
  • CI/CD integration
  • Automated unit and integration testing

Step 4 - Testing and Quality Assurance

During the testing phase, we ensure a high level of quality through rigorous testing, performance optimization, accessibility improvements and continuous crash monitoring.

Key activities:

  • Manual and automated testing
  • Stability across different devices
  • Performance optimization
  • Accessibility improvements
  • Crashlytics

Steg 5 - Launch and Support

After launch, we ensure the app is published correctly, remains up to date and is continuously improved based on user data and evolving needs.

Key activities:

  • App Store and Google Play publishing
  • Post-launch support and updates
  • Continuous improvements and new features
  • Analytics follow-up and ASO improvements
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Contact Us to Build Your Mobile App!

Bring your app idea to life with our experienced design and development team

Talk to an Expert

More than 100+ projects brought to life

Built with modular architecture, clean code and all the benefits of cross-platform development: faster delivery, native performance and a seamless experience across every device.

SafeSite – Evacuation in Everyone’s Pocket

For SafeSite Sweden AB, we developed a robust, user-centered mobile app for Android and iOS with a focus on ease of use.

SafeSite – Evacuation in Everyone’s Pocket
Train like a pro with Trackfellow

See how ScriptSector helped Trackfellow develop an app and website for dog tracking, mantrailing, GPS training and statistics.

Train like a pro with Trackfellow
Fastighetsgurun - Sweden's #1 real estate channel

We built a complete training portal for Fastighetsgurun to digitize and streamline their course offering in property management.

Property Guru - Sweden's #1 real estate channel

See what out clients say about us

Questions you might have

Do you develop apps for both iOS and Android?

Yes, we offer both native development, where we build separate apps for each platform, and React Native development, which allows us to create a shared codebase for iOS and Android. We can help you choose the right approach for your needs.

How much does it cost to develop an app?

The cost of app development depends on the app's complexity and the number of development hours required. A simple app may take 40 hours, while an advanced app with integrations may require more than 1,000 hours. Simple apps therefore start at around SEK 40,000, while larger solutions typically cost SEK 200,000-500,000. Book a meeting and we will provide a more accurate estimate based on your requirements.

How long does it take to develop an app?

The timeline depends on the app's size and complexity. A simple MVP can be ready in six weeks with our MVP Sprint. A more advanced app with integrations typically takes four to six months. We always establish a clear timeline at the start of the project.

What additional costs are involved in app development?

We do not charge any fees beyond the cost of developing the app. However, you will need to pay for an Apple Developer account at USD 149 per year and a Google Play account with a one-time fee of USD 25. Additional license fees may also apply if the app integrates with third-party services.

Will I own the results of your work?

Yes. Provided you meet the terms of the agreement and make the required payments, you will own the source code, Figma designs and all documentation in full.

Do you offer a warranty, and how does maintenance work?

Yes. Every project includes a warranty period during which we fix any bugs at no additional cost. In addition, 90% of our clients choose to continue working with us for ongoing maintenance and support, ensuring their app remains up to date, secure and reliable.

Can you fix my existing app?

Simply put, yes. We begin by reviewing the app's code and architecture to understand how it has been built. We can then take over its maintenance and further development. Based on the review, we will also assess whether continuing with the existing app is commercially viable.

Still have questions?

Contact us