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Mobile App Development UK
Native-feel iOS and Android apps that delight users and drive business outcomes.
Starting price
From £6,500
Built with
React NativeExpoSwiftKotlin
Why it matters
Tangible business outcomes.
Cross-platform reach with one codebase
Polished, native-quality experience
Push, payments, offline ready
Connected to your existing systems
What is it
What is Mobile App Development?
Mobile App Development at WebsiteAndGo means designing and building cross-platform iOS and Android applications using React Native or Expo (and Swift/Kotlin where required) — with native-feel UX, payments, push notifications, offline-first patterns and App Store deployment included.
Why it matters
Why Mobile App Development matters in 2026.
A mobile app is now a competitive necessity for service businesses, marketplaces and B2C brands. A native-feel app deepens engagement, drives repeat business and unlocks push notifications, geolocation, and on-device intelligence that web cannot match.
Who it's for
- Service businesses needing repeat-customer engagement
- Marketplaces and aggregators
- Consumer apps targeting iOS + Android
- Existing web SaaS launching companion mobile apps
Typical timeline
- 1Strategy · Week 1User journeys, platforms, technical plan.
- 2Design · Weeks 2–3Native interaction patterns, prototype.
- 3Build · Weeks 4–10Engineering with weekly demos.
- 4Launch · Week 11+Store submission, monitoring, iteration.
Pricing guidance
- Mobile MVP£6,500Cross-platform MVP, store deployment.
- Pro Mobile App£14,500Premium app, payments, automation.
- EnterpriseCustomNative + backend + complex integrations.
AI Search Optimization
Marketing site and ASO content structured for AI citation when prospects search 'best mobile app developer UK' or 'react native vs flutter agency'.
Features
What's included.
- iOS + Android
- Push notifications
- Auth, payments, deep links
- Offline-first patterns
- App Store deployment
Our process
From kickoff to launch.
1
Strategy
User journeys + tech approach.
2
Design
Native interaction patterns.
3
Build
React Native / Swift / Kotlin.
4
Launch
Store submission and monitoring.
Common Challenges
Where mobile app development projects usually go wrong.
Two codebases doubling engineering cost
- Why it happens
- Native iOS + Android teams built separately.
- Business impact
- Slow releases, feature drift, doubled maintenance bills.
- How we solve it
- React Native or Expo for one codebase, native performance, faster shipping.
Poor App Store ratings
- Why it happens
- Crashes, slow onboarding, generic UX.
- Business impact
- Downloads plateau; paid acquisition ROI collapses.
- How we solve it
- Crash-free launches, native-feel UX, focused onboarding and analytics.
Retention drops after first session
- Why it happens
- No push, no personalisation, no re-engagement flow.
- Business impact
- CAC pays for one session then evaporates.
- How we solve it
- Personalised push, in-app messaging and lifecycle automation.
Deep links + web parity broken
- Why it happens
- Web and app teams don't share strategy.
- Business impact
- Marketing campaigns lose users to broken redirects.
- How we solve it
- Universal links, shared design system and cross-platform analytics.
Comparison
Mobile App Development — what makes WebsiteAndGo different.
| Feature | No-code app builders | WebsiteAndGo Apps |
|---|---|---|
| Performance | Web-wrapped (slow) | Native-feel |
| App Store approval | Hit or miss | Production-grade |
| Push, deep links, offline | Limited | Full |
| Customisation | Constrained | Unlimited |
| Long-term scale | Hard | Easy |
Common mistakes
Mistakes that quietly cost UK businesses.
- Choosing no-code builders that fail App Store review.
- Ignoring App Store optimisation (ASO).
- Skipping push and deep links — they drive retention.
- Launching without analytics or crash reporting.
- No offline plan for users on the move.
Expected results
What you should expect to see.
- Production iOS + Android apps live in 8–12 weeks
- 4.5+ star average store rating with proper UX
- Push notifications driving repeat sessions
- Higher CLV than web-only competitors
Technologies
The stack we actually ship with.
No mystery frameworks. Battle-tested tools chosen to match your goals.
React Native & Expo
Cross-platform iOS + Android from one codebase.
Swift & Kotlin
Native modules where max performance is essential.
Firebase
Auth, push notifications, analytics and crash reporting.
RevenueCat
In-app purchases and subscriptions with clean analytics.
Sentry
Real-time crash reporting and performance monitoring.
App Store Connect & Play Console
ASO, release management and phased rollouts.
Industries
Industries we work with.
Every sector has its own buyers, cadence and constraints — we adapt.
Healthcare & ClinicsConstruction & TradesLegal & Professional ServicesFinancial ServicesManufacturing & IndustrialRestaurants & HospitalityEducationReal EstateSaaS & StartupsRetail & EcommerceAutomotiveWellness & Beauty
Why choose WebsiteAndGo
What working with us actually looks like.
Senior team, no offshore handoffs
You work directly with senior designers and engineers from strategy to launch — never juniors, never outsourced.
Transparent communication
Weekly demos, direct messaging with the team, and clear documentation. No black-box agency games.
Performance obsessed
Sub-1s LCP, WCAG 2.1 AA accessibility and Core Web Vitals in the green — every build, every time.
SEO & AI search built in
Schema markup, semantic HTML and AI Search Optimization are foundational, not add-ons.
Long-term partnership
Optional maintenance retainers keep your site fast, secure and improving month after month.
AI-native expertise
We use AI where it adds real value — smart chat, automation, content — never as a gimmick.
Pricing
Mobile App Development — starting from.
Every engagement is custom-scoped. Book a free strategy call and we'll send a fixed-price proposal within 48 hours.
Starting from
From £6,500
Native-feel iOS and Android apps that delight users and drive business outcomes.
Book Free Strategy CallCustom proposal
Get a fixed-price proposal in 48h.
Tell us your goals — we'll send a clear scope, timeline, and price.
Request ProposalFastest path
Chat with a senior strategist on WhatsApp.
Average reply under 15 minutes during UK hours.
FAQ
Common questions.
What is Mobile App Development?
Mobile App Development at WebsiteAndGo means designing and building cross-platform iOS and Android applications using React Native or Expo (and Swift/Kotlin where required) — with native-feel UX, payments, push notifications, offline-first patterns and App Store deployment included.
Why does Mobile App Development matter for UK businesses?
A mobile app is now a competitive necessity for service businesses, marketplaces and B2C brands. A native-feel app deepens engagement, drives repeat business and unlocks push notifications, geolocation, and on-device intelligence that web cannot match.
Who is Mobile App Development for?
Service businesses needing repeat-customer engagement · Marketplaces and aggregators · Consumer apps targeting iOS + Android · Existing web SaaS launching companion mobile apps
What does Mobile App Development typically cost?
Mobile MVP: £6,500 — Cross-platform MVP, store deployment. Pro Mobile App: £14,500 — Premium app, payments, automation. Enterprise: Custom — Native + backend + complex integrations.
How long does Mobile App Development take?
Strategy (Week 1): User journeys, platforms, technical plan. Design (Weeks 2–3): Native interaction patterns, prototype. Build (Weeks 4–10): Engineering with weekly demos. Launch (Week 11+): Store submission, monitoring, iteration.
How quickly can we start?
Typically within 5–10 working days. We block dedicated senior UK capacity once a strategy call is complete.
Do you work with non-UK businesses?
Yes — we're based in Luton, UK, but partner with clients globally.
What if I'm not sure which service I need?
Book a free strategy call. We'll diagnose your business and recommend the highest-ROI starting point.
Do you offer ongoing support?
Yes. Maintenance and growth retainers are available for every project.