Mobile App Development: Complete Guide for UK Businesses 2026
Mobile app development gives UK businesses a direct channel to customers. This guide covers React Native and Flutter, the development process, typical costs, and how to choose the right agency.
What is Mobile App Development?
Mobile app development is the process of creating software for smartphones and tablets. For UK businesses, the choice between native (iOS/Android separately) and cross-platform (one codebase for both) is crucial. Cross-platform frameworks like React Native and Flutter let you build iOS and Android apps 40% faster with a single codebase.
At KinKo Digital, we specialise in cross-platform mobile app development for UK businesses. Our Lancashire-based team builds apps with React Native and Flutter, delivering native-level performance while cutting development time and cost.
React Native vs Flutter: Which to Choose
Both React Native and Flutter deliver cross-platform apps from one codebase. React Native uses JavaScript/TypeScript and React; Flutter uses Dart. React Native has a larger ecosystem; Flutter offers smoother animations and consistent UI. For most UK startups, either works—choose based on team skills and ecosystem needs.
Read our detailed Flutter vs React Native comparison for startups.
Benefits of Cross-Platform Development
Faster Launch
One codebase for iOS and Android cuts development time by 30-40%.
Lower Cost
Build once, deploy twice. Reduces budget vs. separate native apps.
Consistent UX
Same experience across platforms. Easier to maintain and update.
The Mobile App Development Process
Discovery & Requirements
Define features, user flows, and technical requirements.
Design & Prototype
UI/UX design, wireframes, and interactive prototypes.
Development
Build with React Native or Flutter. Weekly demos and feedback loops.
Testing
QA on real devices, performance checks, App Store / Play Store prep.
Launch & Support
Submission to stores, launch support, and ongoing maintenance.
Mobile App Development Cost UK
UK mobile app costs vary by complexity. MVP apps: £15,000–£35,000. Full-featured apps: £35,000–£80,000+. Cross-platform typically costs 30-40% less than separate native builds.
See our Flutter app development cost breakdown for detailed UK pricing.
Choosing a Mobile App Development Company
Look for agencies with React Native or Flutter experience, UK-based teams, and a clear process. Check portfolios for apps similar to yours and ask about ongoing support.
- React Native or Flutter expertise
- UK-based or UK-timezone team
- Transparent pricing and timelines
- Post-launch support
Conclusion
Mobile app development with React Native or Flutter offers UK businesses a faster, more cost-effective path to iOS and Android. Choose an agency with proven cross-platform experience and a process that fits your timeline.