How much does app development cost in the UK?

With Webshark, a simple app typically costs £15,000 to £40,000, a mid-complexity app £40,000 to £90,000, and complex fintech, healthcare or marketplace apps start from £90,000, usually well below London agency prices. App development cost in the UK depends on the number of screens and user roles, native versus cross-platform development, backend complexity, integrations such as payments or Open Banking, and compliance needs. We provide a detailed, itemised quote after discovery.

How long does it take to build an app?

An MVP usually takes 8 to 12 weeks, a full-featured app 3 to 6 months, and complex enterprise or marketplace apps 6 to 9 months. Timelines depend on feature scope, the number of platforms, backend and integration work and how quickly feedback and approvals happen. Choosing Flutter or React Native can shorten delivery because one codebase serves both iOS and Android. We share a sprint plan at the start and builds every two weeks so you can track progress.

Do your app developers work in UK hours?

Yes. Our app developers overlap with the UK working day for daily stand-ups, sprint reviews, design sessions and ad hoc calls. Builds are shared every two weeks through TestFlight and Google Play testing tracks so you can try new features on your own devices. We communicate through Slack, Microsoft Teams and Jira, and project managers are reachable during UK business hours for urgent issues, so working with us feels close to having an in-house app team.

Should I build a native or Flutter app?

Flutter or React Native suits most UK start-ups and business apps because one codebase serves both iOS and Android, which reduces cost and speeds up updates. Native Swift and Kotlin are better for heavy graphics, complex device features such as Bluetooth, AR or background processing, or apps where maximum performance matters. As an app development company working with both, we recommend the approach that fits your goals, budget, timeline and long-term maintenance plans.

Is your app development UK GDPR compliant?

We follow ISO 27001 certified processes and UK GDPR and Data Protection Act 2018 aligned practices. We sign NDAs and data processing agreements, collect only the data your app needs, encrypt data in transit and at rest and can host app data in UK or EU cloud regions. We also build consent screens, privacy settings and data export or deletion features, and help you complete App Store privacy labels and Google Play data safety forms accurately.

Why choose Webshark as your app development company in the UK?

Webshark has delivered 580+ projects for 280+ active clients across 18+ countries under ISO 27001 and CMMI Level 3 certified processes. We also build and run our own live apps, including Webshark Health on iOS and Android, so we know first-hand what it takes to launch, pass store reviews and grow an app. As an app development company serving the UK, we bring designers, mobile developers, backend engineers and QA together in one accountable team, with hours that overlap the UK working day, transparent pricing in pounds sterling and full code ownership.

Can you also build the web platform behind our app?

Yes. Most apps need more than the mobile front end, so we also build admin panels, customer and partner web apps, APIs and integrations that share the same backend. This keeps data consistent and avoids paying separate vendors to connect their work. Admin panels typically cover user management, content, orders, reports and role-based access, and can integrate with your CRM, accounting or ERP systems. See our bespoke software development page.

Do you work with London businesses?

Yes. We work with London businesses in fintech, healthcare, property, retail and hospitality, as well as start-ups and companies elsewhere in the UK. Discovery workshops, sprint reviews and support run remotely in UK hours, and in-person workshops can be arranged for larger app projects. Remote delivery gives London teams access to experienced app developers without London agency costs, while keeping communication and collaboration straightforward.

Which technologies do you use?

For app development in the UK, we use Swift for native iOS, Kotlin for native Android and Flutter or React Native for cross-platform apps. Backends are built with Node.js, Python, Java Spring Boot or .NET, with admin panels in React, Next.js or Angular. Apps run on AWS, Azure or Google Cloud, often in UK regions, with Firebase for notifications and analytics. We choose the stack based on performance, security, budget and your in-house skills.

Who owns the source code and IP?

You do. All source code, UI designs, backend code, documentation and deployment scripts from your app development project belong to your company once payments are cleared, with a clear intellectual property assignment in our contract. Apps are published under your own App Store and Google Play developer accounts, and code is stored in repositories you control. We sign NDAs and data processing agreements before discovery starts.

Can I hire a dedicated team instead of a fixed-price project?

Yes. Many UK start-ups and scale-ups hire dedicated mobile engineers on monthly contracts after launching an MVP, to keep shipping features at pace. Options range from one Flutter or React Native developer to a full squad with a product manager, designer, backend developer and QA engineer. Your team joins sprint ceremonies in UK hours, sets priorities directly and can scale up or down as funding and roadmap change. See our hire full-stack developers page.

Do you provide support after launch?

Yes. Our app support plans cover compatibility updates for new iOS and Android versions, bug fixes, crash monitoring, security patches, backend monitoring and new features. Support is provided by a team whose hours overlap with the UK working day, with priority handling for critical issues such as login or payment failures. You receive monthly reports on stability, performance and usage, which help you plan releases based on real user data.

TRUSTED BY BUSINESSES IN THE UK, USA AND 18+ COUNTRIES

Apps UK customers love, built by senior app developers

App Development Company UK

iOS, Android, Flutter and React Native apps for UK businesses.
App developers who work in UK hours, in your tools.
From MVP to enterprise apps, with App Store launch support.
ISO 27001 and CMMI Level 3 certified, 580+ projects delivered.

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App Developers for UK Start-ups and Enterprises

Webshark is an app development company serving businesses across the UK, from London start-ups to established brands in Manchester, Birmingham and Edinburgh. Our app developers design and build iOS, Android, Flutter and React Native apps for fintech, healthcare, retail, property, education and on-demand services, covering product strategy, UX design, development, backend and APIs, testing, App Store and Google Play launch and ongoing growth. Many UK clients come to us for app development London agencies quote far higher for, and get the same senior engineering through our Bengaluru delivery centre with daily overlap in UK working hours. Every project follows ISO 27001 certified security, CMMI Level 3 processes and UK GDPR-aligned data handling. Want to see our wider mobile capabilities? See our mobile app development company.

Years of Software Engineering Experience

580+

Projects Delivered Across Industries

18+

Countries Served, Including the USA

280+

Active Clients Trusting Our Engineering

App Development for UK Clients Built Around Security and Compliance

Every app we build for UK clients follows ISO 27001 certified security and CMMI Level 3 processes, with data handling aligned to UK GDPR, the Data Protection Act 2018, PCI DSS for payments and the OWASP Mobile Top 10.

GDPR

CCPA

HIPAA

DPDP Act, 2023

PCI DSS

PSD2

EMV & 3DS

ISO/IEC 9001

ISO/IEC 27018

SOC 2 Type II

FISMA

NIST Cybersecurity Framework

ISO 13485

PIPEDA

ISO/IEC 27001

OWASP

W3C

App Development Services We Offer UK Clients

From a first MVP to a portfolio of enterprise apps, our app development company covers design, build, launch and growth.

Mobile App Development Company UK Teams Trust

Native performance where it matters, cross-platform speed where it saves you budget.

iOS App Development

Swift and SwiftUI apps built to Apple guidelines.

Android App Development

Kotlin apps tested across popular UK devices.

Flutter and React Native Apps

One codebase for iOS and Android, faster to market.

MVP App Development

Launch a testable MVP in 8 to 12 weeks.

Fintech and Healthcare Apps

Secure apps for regulated UK industries.

App Modernisation and Support

Rescue, upgrade and maintain existing apps.

Why UK Businesses Choose Our App Developers

Great apps need great engineering, clear communication and fair pricing. That is what we offer UK clients.

Senior App Developers, Fair Pricing

Our app developers average many years of experience across iOS, Android and cross-platform apps. Because they work from our Bengaluru delivery centre, UK clients typically pay far less than London day rates for the same quality, with code reviews, automated testing and CI/CD on every build.

UK Hours and Transparent Delivery

Your app team overlaps with the UK working day, joins your Slack or Teams, shares builds every two weeks through TestFlight and Play Console, and reports progress weekly. A named project manager keeps your app development on time and on budget.

How Our App Development Works for UK Clients

A proven process takes you from idea to a successful App Store and Google Play launch.

Discovery and Strategy

Every project with our app development company for UK clients begins with discovery and strategy workshops held in UK hours. We define your target users, the problem the app solves, core features, monetisation model and success measures such as activation, retention and revenue per user. We then trim the feature list into an MVP that proves value quickly. Within one to two weeks you receive a product scope, user stories, release roadmap and a clear quote in pounds sterling.

UX and UI Design

Our designers map every journey, from onboarding and sign-up to payments, bookings or account management, then create wireframes and polished screens that follow Apple Human Interface and Material Design guidelines. We turn designs into clickable prototypes and test them with real UK users over video calls, fixing confusing steps before any code is written. You receive a full design system and screen files, typically within two to four weeks.

Architecture and Backend

Here our architects decide between native Swift and Kotlin or cross-platform Flutter and React Native, based on performance needs, budget and timelines. We design the backend, database and secure APIs, and plan integrations such as Stripe or GoCardless payments, Open Banking, NHS login where relevant, maps, push notifications and your CRM. You receive an architecture document and API plan that keeps the app secure, UK GDPR aligned and ready to scale.

App Development

Our app developers work in two-week agile sprints, each ending with a working build you can install through TestFlight or a Google Play test track. You join sprint reviews in UK hours, test features on your own phone and reprioritise based on what you learn. Code is peer-reviewed, covered by automated tests and stored in a repository you own, so progress is transparent and quality stays consistent as the app grows.

Testing and QA

Our QA engineers test functionality, usability, performance and security across popular iPhones, iPads and Android devices used in the UK. We include accessibility checks for screen readers, dynamic text sizes and colour contrast, which matter for public-facing and healthcare apps. We also test payments, offline behaviour and poor network conditions and review OWASP mobile risks. Every bug is logged, fixed and retested before release.

App Store Launch

We manage the full App Store and Google Play launch. That includes store listings, keyword-optimised descriptions, screenshots, preview videos, privacy nutrition labels and data safety forms, plus guidance on developer account setup under your company name. We handle submission, respond to reviewer feedback and resolve rejections quickly, then plan a phased rollout. Launch support continues with close monitoring of crashes, ratings and early user behaviour.

Growth and Support

After launch we monitor crashes and performance with tools like Firebase Crashlytics, track user analytics and share monthly insight reports. Our team ships updates for new iOS and Android releases, fixes issues quickly and adds features based on real usage data and user feedback. As your user base grows, we scale the backend, optimise cloud costs and plan new releases, so your app keeps improving and keeps users coming back.