Custom App DevelopmentThat Drives Results
Transform your business ideas into powerful mobile and web applications. From concept to launch, we build apps that users love.
Custom Applications & Business Software, Built In-House
Off-the-shelf software is rarely a perfect fit. The bigger your business gets, the more you end up moulding your processes around the limits of someone else's product — spreadsheets bolted to workarounds bolted to disconnected systems. Custom-built software flips that on its head. It does exactly what your business needs, the way you actually work, and scales with you as you grow.
XL Marketing's in-house development team has been building bespoke web apps, mobile apps and back-office systems for UK businesses for over fifteen years. From CRM platforms and quoting tools to MRP systems, customer portals and fully native mobile apps for iOS and Android, we design and develop software that pays for itself in time saved, errors avoided and revenue unlocked.
Web, Mobile & Back-Office
We work across custom web applications, native iOS & Android apps, database-driven business systems, CRM & MRP platforms, customer and dealer portals and third-party API integrations that pull together the tools you already use. Whatever the project, the same team handles design, development, testing, deployment and ongoing support — so you always know who to call.
Built To Last, Supported Long-Term
Bespoke software is only as good as the team behind it. We write clean, modern, well-documented code so your platform stays fast, secure and easy to extend as your business changes. Most of the systems we've built are still running and growing years later — because we're still here, looking after them.
If you've got an idea for a custom app or you're tired of patching together off-the-shelf tools that don't quite fit, let's talk. Use the form below for a no-obligation scoping conversation with our development team.
Apps for Every Platform
Whether you need native iOS, Android, cross-platform mobile apps, or progressive web applications, our expert developers deliver exceptional results.
iOS App Development
Native Swift and SwiftUI applications for iPhone and iPad with seamless Apple ecosystem integration.
- Swift & SwiftUI
- App Store Optimisation
- Apple Pay Integration
- Push Notifications
Android App Development
Kotlin and Java applications optimised for the full range of Android devices and tablets.
- Kotlin & Java
- Material Design 3
- Google Play Services
- Firebase Integration
Cross-Platform Apps
React Native and Flutter apps that work beautifully on both iOS and Android from a single codebase.
- React Native
- Flutter
- Single Codebase
- Native Performance
Web Applications
Progressive Web Apps and responsive web applications with app-like experiences in the browser.
- Progressive Web Apps
- React & Next.js
- Offline Support
- Responsive Design
Not sure which platform is right for your business? Our experts can help you decide.
App Development Packages
Choose the package that best fits your needs. All packages include project management, quality assurance testing, and app store submission.
Starter
Starting from
Perfect for MVPs and simple applications
- Single platform (iOS or Android)
- Up to 5 core screens
- Basic UI/UX design
- User authentication
- Push notifications
- 4-6 week delivery
- 3 months support
Professional
Starting from
Our most popular package for growing businesses
- iOS and Android apps
- Up to 15 screens
- Custom UI/UX design
- Backend API development
- Payment integration
- Analytics dashboard
- 8-12 week delivery
- 6 months support
Enterprise
Bespoke pricing
Complex applications with advanced features
- All platforms + web app
- Unlimited screens
- Premium UI/UX design
- Complex backend systems
- Third-party integrations
- Admin dashboard
- 12-20 week delivery
- 12 months support
- Dedicated account manager
Frequently Asked Questions
Everything you need to know about our app development services
Still have questions? We're here to help!
Get in TouchApp Development Resources
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