Mobile app · Physio clinic group
Apps iOS · Android · Web apps
App Development Company UK mobile & web apps that people love to use.
Whether it's a customer app, a booking system or a new SaaS idea, our app developers design and build iOS, Android and web apps that are simple to use and built to grow — starting with a focused MVP so you can launch fast and learn from real users.
- iOS & Android from one codebase
- MVPs in as little as 10–12 weeks
- You own the code & IP
★★★★★4.9/5 Google · Top Rated on Upwork
10–12 wksTypical MVP timeline
4.8★Avg. app store rating
1Codebase for iOS & Android
100%Code & IP owned by you
Why build an app
Have an app idea — or a process that needs one?
Many great app ideas stall at the first hurdle: unclear scope, quotes that range from £5k to £500k, and developers who build for months before anyone sees a working screen. We make it simple — clear scope, fixed prices and working builds every two weeks.
What is app development?
App development is the process of designing, building, testing and launching software applications for mobile devices (iOS and Android) or web browsers. It covers product discovery, UX/UI design, front-end and back-end development, APIs and integrations, testing, app store submission and ongoing support. Cross-platform frameworks such as React Native and Flutter allow one codebase to run on both iPhone and Android.
01
Idea stuck on paper
You know what you want, but not how to build it.
02
Wildly different quotes
Impossible to compare prices or scope.
03
Manual processes
Spreadsheets and paper forms slowing your team down.
04
Burned before
A previous developer disappeared or over-ran.
What's included
Our app development services
From first idea to app store launch — and beyond.
Discovery & scopingWorkshops to define users, features and a realistic MVP.
UX/UI app designUser flows, wireframes and clickable prototypes in Figma.
iOS & Android appsCross-platform mobile apps with React Native or Flutter.
Web apps & portalsCustomer portals, dashboards and internal tools in React.
MVP & SaaS buildsLaunch a focused first version fast, then grow it.
APIs & integrationsPayments, CRMs, bookings, maps and AI features.
Testing & app store launchQA on real devices, then App Store and Google Play submission.
Support & iterationMonitoring, updates and new features after launch.
Technology
The technology we build with
Proven, well-supported technology — so your app is fast, secure and easy for any developer to maintain in future. No lock-in.
Mobile apps
One codebase for iPhone and Android — faster to build, cheaper to maintain.
React NativeFlutterExpoSwift / Kotlin (when needed)
Web apps & portals
Fast, secure dashboards and portals that work in any browser.
ReactNext.jsVueTailwind CSS
Backend & data
Reliable APIs, databases and user accounts that scale with you.
LaravelNode.jsFirebaseSupabase / PostgreSQL
Integrations
Connect payments, CRMs, maps and AI to automate the busywork.
StripeHubSpot / GoHighLevelGoogle MapsOpenAI & Claude APIs
Related services
All web design services
Services that work with your app
Everything needed to launch, market and automate around your app.
Custom Website DesignA marketing website to launch and sell your app.Learn moreNewAI AutomationAI assistants and automations inside your app or business.Learn moreGoHighLevel CRMCRM, pipelines and automated follow-up.Learn moreConversion Rate OptimisationImprove sign-ups and in-app conversions.Learn morePaid Social AdvertisingApp install and sign-up campaigns.Learn moreDigital Marketing StrategyA go-to-market plan for your launch.Learn more
Our app process
What happens, and when
Working builds every two weeks — you'll never wait months to see progress.
- Weeks 1–2
Discovery & scope
Users, features and MVP scope agreed with a fixed-price quote.
A clear roadmap - Weeks 2–4
UX/UI design
User flows, designs and a clickable prototype to test with users.
Approved prototype - Weeks 4–10
Build in sprints
Two-week sprints with a working build you can test on your phone.
Working app - Weeks 10–12
Test & launch
Device testing, fixes and App Store and Google Play submission.
Live in the stores
Results
All case studies
App development case studies
Web app · Trades business, Leeds
SaaS MVP · Start-up, Manchester
Why AY Experts
Why choose us for app development
| Feature | Typical app developer | AY Experts |
|---|---|---|
| Pricing | ✕Open-ended day rates | Fixed-price quotes per phase |
| Progress | ✕See it at the end | Working build every 2 weeks |
| Platforms | ✕Separate iOS & Android builds | One codebase for both |
| Ownership | ✕Code held by the agency | You own the code & IP |
| After launch | ✕Extra cost for every fix | Support plans & warranty |
App development UK
App development for UK businesses — from our Manchester base
We build apps for businesses and start-ups across Greater Manchester, and for clients throughout the UK and internationally.
ManchesterSalfordStockportTraffordBoltonOldhamGreater ManchesterUK-wideInternational
We also work with businesses in
Pricing
App development pricing
Fixed-price quotes after a free discovery call — no open-ended day rates.
Client reviews
What our app clients say
Businesses and agencies across the UK trust us with their growth.
"Within six months we went from page three to the top of Google for our main services. The team explains everything in plain English and actually picks up the phone."
James W.Director, Kestrel Law · Manchester
Google"We white-label all our SEO and WordPress work through AY Experts. Deadlines are always hit, reports go out under our brand, and our clients are happier than ever."
Hannah R.Founder, Pixel & Pine · London
Google"Our Google Ads cost per lead dropped by almost half in the first two months. It's the first agency where I've felt they care about our money like we do."
Mark T.Owner, Northpoint Home Services · Leeds
Google"They rebuilt our Shopify store and set up email flows. Conversion rate is up and the site finally loads fast on mobile. Fantastic to work with."
Tom R.Founder, Brightlane
Google"Every enquiry now gets an instant reply and a booking link thanks to their GoHighLevel setup. We've stopped losing leads over the weekend."
Daniel O.Operations Lead, Halcyon Clinics · Manchester
Google
FAQs
App development questions, answered
What founders and businesses ask us most about building an app.
Got an app idea?Book a free discovery call and get a fixed-price quote.Get my free app quote
How much does it cost to build an app in the UK?
Our app MVPs start from £8,000, and fuller business apps with accounts, payments and admin dashboards from £18,000. Complex platforms are quoted individually. Every phase has a fixed price agreed upfront.
How long does it take to build an app?
A focused MVP typically takes 10–12 weeks from discovery to launch. Larger apps take 4–6 months, delivered in two-week sprints so you can test progress throughout.
Should I build a mobile app or a web app?
Build a mobile app if users need it daily, offline, or with phone features like notifications and the camera. A web app is often faster and cheaper for portals, dashboards and internal tools. We'll advise honestly during discovery.
Do you build for both iPhone and Android?
Yes. We usually use React Native or Flutter, so one codebase runs on both iOS and Android — saving time and cost without compromising the experience.
Will I own the app and the source code?
Yes. Once the project is paid, you own the source code, designs and intellectual property, and all accounts are set up in your name.
Can you help publish the app to the App Store and Google Play?
Yes. We handle app store listings, screenshots, submission and review, and support you through any feedback from Apple or Google.
Do you sign an NDA?
Yes. We're happy to sign an NDA before you share your idea in detail.
Free proposal
Get your free app development quote.
Tell us a little about your goals and we'll send a tailored plan with timelines and a fixed price. No hard sell, no obligation.
No obligation
NDA on request
Same-day reply
4.9★ Google
Prefer to talk? Call or WhatsApp +44 7476 930739
Email support@ayexperts.com
Or book a call in our calendar →