Mobile App Development Services
Your app lives on the most personal device your customers own — so it has to be fast, intuitive and reliable from the first tap. We design, build and launch iOS, Android and cross-platform apps that people keep using, then support and grow them after release.
Start A Project
The more you tell us, the sharper the first reply.
- Native and cross-platform expertise
- Product strategy to App Store launch
- Secure, scalable back-ends
- Support and updates after release
A Mobile App Development Company Focused on Retention
Downloads are easy to celebrate; retention is what makes an app successful. We design apps around the moments that bring users back — quick tasks, useful notifications and experiences that feel native on each platform — and we measure success by engagement, not installs.
Product strategists, designers, mobile engineers, back-end developers and QA specialists work as one team. You get a clear roadmap, fortnightly builds on your own phone and an app that's ready for real-world scale, security reviews and App Store scrutiny.
- Mobile apps launched
- 150+
- Average App Store rating
- 4.7★
- Downloads across client apps
- 10M+
Find Your Path
Where are you starting from?
Most clients come to us in one of three situations. Pick the one that sounds like yours.
- 01We have an app ideaYou know the problem you want to solve. We'll validate the idea, define an MVP, prototype the experience and build a first release you can put in front of real users.Jump to pricing
- 02Our app needs rescuingCrashes, poor reviews or a codebase nobody wants to touch. We audit, stabilise and modernise your app — or rebuild it on a better foundation.See our services
- 03We need to scale our appYour app works, but growth is exposing limits. We add features, improve performance and strengthen the back-end so it keeps up with demand.Talk to an app expert
Ready to Turn Your App Idea Into a Product?
Talk to an App StrategistMobile App Development Services for Every Platform
Native or cross-platform, consumer or enterprise — every service below is delivered by mobile specialists who follow Apple and Google's guidelines and build for performance, security and long-term maintainability.
Start Your App ProjectAndroid App Development
Native Android apps built with Kotlin and Jetpack Compose that perform smoothly across the huge range of Android devices.
Explore Android App DevelopmentiOS App Development
Native iPhone and iPad apps built with Swift and SwiftUI that feel at home on Apple devices and pass App Store review smoothly.
Explore iOS App DevelopmentCross-Platform App Development
One codebase, two app stores — cross-platform apps that cut cost and time to market without compromising on user experience.
Explore Cross-Platform App DevelopmentFlutter App Development
High-performance Flutter apps for iOS, Android and web, with pixel-perfect custom UI and a single, maintainable Dart codebase.
Explore Flutter App DevelopmentReact Native App Development
React Native apps that share code and talent with your web team, delivering native iOS and Android experiences from one JavaScript codebase.
Explore React Native App DevelopmentApp Maintenance & Support
Ongoing app maintenance — OS updates, bug fixes, monitoring, security patches and improvements — that keeps your app stable and highly rated.
Explore App Maintenance & SupportNot Sure Whether to Go Native or Cross-Platform?
Get Platform AdviceTrusted By Leaders,Proven By Results
How Much Does App Development Cost?
Three clear packages, from a £2,240 cross-platform app of up to 8 screens to enterprise and SaaS products. Each one includes design, testing, store submission help and post-launch support.
Essential
Up to 8 screens£2,240
Best for startups and small businesses launching their first mobile app.
- Cross-platform app for iOS and Android
- Up to 8 custom-designed screens
- Custom UI/UX design
- User registration and secure login
- Basic database integration
- Push notification setup
- Simple API integration
- Mobile responsive layouts
- Basic analytics and crash reporting
- App Store and Play Store submission assistance
- 2 revision rounds
- 30 days post-launch bug support
Estimated delivery: 4–6 weeks
Get StartedProfessional
Up to 20 screens£5,230
Best for growing businesses requiring advanced functionality and scalable apps.
- Everything in Essential
- Up to 20 custom-designed screens
- Advanced UI/UX and interactive prototypes
- Custom backend and API development
- Payment gateway integration
- In-app purchases or subscriptions
- User profiles and role-based access
- Real-time chat or messaging
- Advanced push notifications
- Up to 3 third-party integrations
- Basic web-based admin dashboard
- Performance and security testing
- App Store and Play Store submission assistance
- 3 revision rounds
- 60 days post-launch bug support
Estimated delivery: 8–12 weeks
Get StartedEnterprise
Custom screen countCustom
Best for enterprise applications, SaaS platforms, and complex mobile solutions.
- Everything in Professional, as applicable
- Custom native or cross-platform development
- Swift, Kotlin, Flutter or React Native
- Advanced backend and cloud architecture
- AI-powered features and automation
- CRM, ERP and third-party API integrations
- Ecommerce and marketplace functionality
- Advanced real-time features and data sync
- Offline functionality and cloud synchronisation
- Multi-language and multi-region support
- Custom dashboards and admin portals
- Advanced security and performance optimisation
- Scalable database and cloud deployment
- Dedicated project manager and developers
- Priority technical support and maintenance options
Timeline and pricing based on project scope
Request a QuoteFinal pricing is confirmed after a discovery workshop and feature scoping. Prices are shown in GBP, converted from our US dollar price list.
Need an MVP in Front of Users Quickly?
Plan Your MVPOur App Development Process
A proven process that gets working builds onto your phone early and keeps you involved all the way to launch.
- 01
Discovery & Strategy
We clarify goals, users, competitors and the features that matter most for the first release.
- 02
UX & Prototyping
We map journeys and build clickable prototypes to test with users before development.
- 03
UI Design
Platform-appropriate interfaces designed for iOS and Android conventions.
- 04
Agile Development
Fortnightly sprints deliver installable builds you can test on your own device.
- 05
Testing & QA
Device testing, automated tests, performance and security checks before release.
- 06
Launch & Growth
App Store submission, monitoring, updates and feature development after launch.
App Standards We Build To
The quality bars every app meets before it reaches your users.
Apple HIG & Material Design
Interfaces that feel native on each platform.
OWASP Mobile Top 10
Protection against the most common mobile security risks.
Accessibility
Support for screen readers, dynamic type and contrast.
Performance Budgets
Fast launch times and smooth scrolling on mid-range devices.
Privacy Compliance
App Store privacy labels, consent and GDPR requirements.
Crash Monitoring
Real-time crash reporting and alerting from day one.
Automated Testing
Unit and UI tests protect critical journeys.
CI/CD Pipelines
Automated builds and releases for reliable updates.
Technologies Our App Developers Use
Proven mobile technologies chosen for performance, maintainability and your team's long-term needs.
- Swift
- SwiftUI
- Kotlin
- Jetpack Compose
- Xcode
- Flutter
- React Native
- TypeScript
- Expo
- Kotlin Multiplatform
- Node.js
- Laravel
- Firebase
- PostgreSQL
- Google Cloud
- Fastlane
- Firebase Crashlytics
- TestFlight
- Google Play Console
- Docker
High-Impact Features We Build Into Apps
Capabilities that make apps useful, engaging and commercially successful.
- 01Biometric Login
- 02Push Notifications
- 03In-App Payments
- 04Offline Mode
- 05Maps & Geolocation
- 06Real-Time Chat
- 07Camera & Scanning
- 08Wearable Integration
- 09In-App Analytics
- 10Personalised Content
Mobile Apps for High-Growth Industries
We understand the users, regulations and integrations that matter in your sector.
- 01
Fintech
Secure banking, payments, wallet and investing apps.
- 02
Healthcare
Telehealth, patient engagement and wellness apps.
- 03
Ecommerce & Retail
Shopping, loyalty and click-and-collect apps.
- 04
On-Demand
Booking, delivery and service marketplace apps.
- 05
Logistics
Driver, tracking and warehouse apps.
- 06
Education
Learning apps and student companion apps.
- 07
Real Estate
Property search, viewing and tenant apps.
- 08
Fitness & Lifestyle
Workout, nutrition and habit-building apps.
Is Your App Losing Users to Crashes or Bad Reviews?
Get a Free App AuditWhy Choose 360 Digital Online as Your App Development Company?
We build apps as long-term products, not one-off projects — with the strategy, engineering and support that implies.
Product Thinking
We challenge features that don't serve users and prioritise what drives retention.
Native and Cross-Platform
Honest advice on the right approach, and experts in both.
Full-Stack Teams
Mobile, back-end, design and QA under one roof.
Long-Term Support
OS updates, monitoring and new features after launch.
Where App Development Is Heading Next
The emerging capabilities we're already building into mobile products.
- 01
On-Device AI
Private, fast AI features that run directly on the phone.
- 02
AI Assistants in Apps
Conversational help and smart automation inside your app.
- 03
App Clips & Instant Apps
Lightweight experiences without a full install.
- 04
Wearables & Health
Integration with watches, rings and health platforms.
- 05
Spatial Experiences
AR features that blend digital content with the real world.
- 06
Passkeys
Passwordless, phishing-resistant sign-in.
Ready to Build an App People Keep Using?
Start Your ProjectMobile App Development FAQs
How much does it cost to build an app?
Our packages start at £2,240 for a cross-platform app of up to 8 screens and £5,230 for up to 20 screens with a custom backend. Enterprise and SaaS products are priced on scope after a discovery workshop.
How long does app development take?
An MVP typically takes 3–4 months. Full-featured apps usually take 4–9 months, depending on complexity.
Should we build native or cross-platform?
Cross-platform (Flutter or React Native) suits most apps and reduces cost. Native (Swift and Kotlin) is best for apps needing maximum performance or deep platform features. We'll recommend based on your needs.
Do you publish apps to the App Store and Google Play?
Yes. We handle App Store and Google Play submission, including store listings, privacy details and responding to review feedback.
Will we own the app's source code?
Yes. You own the source code and all intellectual property, stored in repositories you control.
Do you build the back-end as well?
Yes. We build APIs, databases, admin panels and cloud infrastructure, or integrate with your existing systems.
Do you support apps after launch?
Yes. We offer maintenance plans covering OS updates, bug fixes, monitoring, performance and new features.
Have A ProjectIn Mind?
Tell us about your project — whether it's a website, an app, SEO or marketing.