Mobile App Development London — Custom Apps for Growing Businesses
In 2024, over 72% of UK businesses recognise mobile apps as essential to customer engagement and revenue growth. Whether you’re a startup disrupting your market or an established business looking to reach customers on their phones, a custom mobile app is no longer optional—it’s competitive necessity.
At WebArrow, we’re a full-service digital agency based in Harrow, London, specialising in building high-performance mobile applications that drive real business results. From initial concept through to launch and ongoing support, we handle every aspect of app development so you can focus on running your business.
Our Mobile App Development Services
iOS App Development
We build native iOS apps optimised for iPhone and iPad, using the latest Swift technologies. Our iOS apps deliver the performance, security, and user experience Apple users expect.
What we deliver:
- Native Swift development for maximum performance
- Full App Store compliance and submission support
- Integration with iOS-specific features (biometrics, notifications, payments)
- Ongoing updates for new iOS versions
Ideal for: Businesses targeting premium markets, enterprise applications, and brands prioritising performance.
Android App Development
Our Android developers build robust apps for the 72% of UK smartphone users on Android devices. We create apps that work seamlessly across all Android devices and versions.
What we deliver:
- Native Kotlin/Java development
- Google Play Store optimisation and launch
- Device compatibility testing across all major manufacturers
- Push notifications and real-time features
Ideal for: Maximum market reach, enterprise deployments, and apps requiring deep Android system integration.
Cross-Platform App Development (React Native & Flutter)
Want to reach both iOS and Android users without building two separate apps? We specialise in cross-platform development using React Native and Flutter, cutting development time and costs by up to 40% while maintaining native performance.
What we deliver:
- Single codebase, simultaneous iOS & Android launch
- Faster time-to-market
- Reduced development and maintenance costs
- Native-like performance and user experience
Ideal for: Startups with budget constraints, MVP launches, and businesses wanting rapid market entry.
Progressive Web Apps (PWA)
Sometimes you need app-like functionality without the App Store barriers. Progressive Web Apps work directly in the browser, offer offline capabilities, and feel like native apps on mobile devices.
What we deliver:
- App-like experience without installation friction
- Offline functionality and fast loading
- No dependency on App Store approval
- Easy updates and maintenance
Ideal for: Service-based businesses, booking platforms, and teams wanting rapid iterations.
App Maintenance & Support
Launching your app is the beginning, not the end. We provide ongoing maintenance, bug fixes, security updates, and feature enhancements to keep your app performing at its best.
What we cover:
- Quarterly security audits and updates
- Performance monitoring and optimisation
- Compatibility updates for new OS versions
- Feature enhancements and user support
- Analytics and user behaviour reporting
Our Mobile App Development Process
1. Discovery & Strategy
We start by understanding your business, target users, and objectives. We conduct competitor analysis and define core features for your MVP (minimum viable product). This phase typically takes 1–2 weeks.
Deliverables: Project roadmap, user personas, feature specifications, timeline & budget.
2. Design & User Experience
Our UX/UI designers create wireframes and interactive prototypes that test user flows before a single line of code is written. We iterate based on your feedback to ensure the app is intuitive and visually on-brand.
Deliverables: Clickable prototypes, design system, user flow documentation.
3. Development & Build
Our developers build your app using best practices for performance, security, and scalability. We use agile development methodology, delivering working features every 2 weeks so you stay informed and involved.
Deliverables: Working app builds, progress updates, technical documentation.
4. Testing & Quality Assurance
Rigorous testing across devices, OS versions, and real-world scenarios catches bugs before your users do. We test functionality, performance, security, and usability.
Deliverables: QA reports, bug fixes, performance benchmarks.
5. Launch & App Store Submission
We handle all the technical and administrative requirements for launching on the Apple App Store and Google Play Store, including app store optimisation (ASO) for visibility.
Deliverables: Live apps on both stores, launch marketing materials, installation guides.
6. Ongoing Support & Growth
Post-launch, we monitor performance, gather user feedback, and implement updates and new features. Regular analytics reviews help identify opportunities to grow user adoption and revenue.
Deliverables: Monthly reports, user feedback analysis, feature prioritisation.
Why Choose WebArrow for Mobile App Development?
Local London Agency You Can Meet
Based in Harrow, we’re not a remote team scattered globally. Meet your project lead in person, discuss complex requirements face-to-face, and build a partnership that feels like an extension of your team.
Transparent, Fixed-Price Contracts
No hidden costs or surprise bills. We provide detailed estimates and work to fixed timelines so you know exactly what you’re paying and when your app launches.
End-to-End Expertise
We don’t just code—we design, test, launch, and support. You get a complete service rather than juggling multiple vendors, reducing complexity and risk.
Proven Track Record
We’ve launched 40+ mobile apps across retail, healthcare, hospitality, and services sectors. Our apps have been downloaded over 500,000 times and achieve 4.6+ star ratings on average.
Agile & Flexible Methodology
We adapt to changing requirements and market conditions. Regular two-week sprints mean you see progress constantly and can adjust priorities as your business evolves.
Post-Launch Support Included
We don’t disappear on launch day. Ongoing maintenance, updates, and feature development keep your app competitive and performing.
Industries We Build Apps For
Retail & E-Commerce
Shoppable apps with inventory integration, payment processing, and customer loyalty features that drive repeat purchases.
Hospitality & Food Service
Restaurant booking apps, online ordering systems, loyalty programmes, and guest management platforms that increase reservations and revenue.
Professional Services
Appointment booking apps for accountants, solicitors, consultants, and therapists that reduce admin and no-shows.
Healthcare & Wellness
Appointment scheduling, telemedicine platforms, patient records access, and health tracking apps for clinics and wellness providers.
Fitness & Personal Training
Class booking, workout tracking, virtual training apps, and membership management for gyms and personal trainers.
Real Estate & Property
Property browsing apps, virtual tours, agent management systems, and tenant communication platforms.
Field Services & Trades
Job dispatch, time tracking, photo documentation, and customer invoicing apps for plumbers, electricians, builders, and maintenance companies.
Types of Apps We Build
Booking & Appointment Apps
Let customers book services 24/7. Reduce phone calls, no-shows, and admin time.
E-Commerce & Retail Apps
Shoppable storefronts that increase average transaction value and enable repeat purchases.
Service Booking Platforms
Connect service providers with customers. Manage schedules, payments, and customer reviews in one app.
On-Demand Apps
Deliver services instantly. Think delivery, cleaning, maintenance, or courier platforms.
Community & Social Apps
Build engagement through in-app messaging, forums, event planning, and group features.
Content & Media Apps
Publishing, video streaming, podcasts, magazines, and educational content platforms.
Marketplace Apps
Connect buyers and sellers. Take commission on transactions with secure payment processing.
Real-Time Collaboration Apps
Team communication, project management, and workflow tools that boost productivity.
Frequently Asked Questions
How much does a mobile app cost?
App development costs range from £8,000 for a simple MVP to £50,000+ for complex, full-featured applications. Most of our clients invest £15,000–£30,000 for a professional, feature-rich app. The cost depends on complexity, design requirements, platform choice (iOS only, Android only, or both), and timeline. We provide a fixed quote after discovery so there are no surprises.
How long does it take to build an app?
A typical app takes 8–14 weeks from kick-off to App Store launch. Simple MVPs can launch in 6 weeks; complex applications with backend systems may take 4–6 months. We work in two-week sprints, so you see progress constantly and can adjust requirements as needed.
Do I need both iOS and Android apps?
It depends on your audience. If you’re targeting UK businesses, 72% are on Android, but premium markets skew towards iOS. We recommend launching on both platforms to maximise reach. Cross-platform development (React Native/Flutter) reduces costs by 30–40% compared to building two separate native apps.
What happens after launch? Do you provide support?
Yes. After launch, we provide ongoing support and maintenance as part of our partnership. This includes security updates, compatibility fixes for new OS versions, bug fixes, and performance monitoring. We also help with feature enhancements and can discuss app monetisation strategies based on user data.
Can you integrate my app with my existing systems?
Absolutely. We integrate apps with CRM systems, payment processors, email platforms, analytics tools, and custom backend systems. We’ve successfully integrated with Shopify, Stripe, HubSpot, Mailchimp, and custom enterprise databases.
Ready to Build Your Mobile App?
Your competitors are already on mobile. Don’t get left behind. Let’s discuss your app idea and how WebArrow can help you reach customers on their phones.
Call us today for a free consultation:
📞 078 2434 4633 / 074 5283 9591
📧 info@webarrow.co.uk
We’re based in Harrow, London, and available for meetings throughout London and the Home Counties.
