Mobile App Development for UK Startups & SMBs
MicroPyramid is a 12-year senior-led engineering team that ships mobile apps for UK startups and SMBs: native iOS and Android, cross-platform Flutter and React Native, and the backends that power them. AI-assisted delivery gets a launchable build in your hands in weeks, not months.
Mobile App Services for UK Teams
End-to-end mobile delivery (from UK-focused MVPs to native, cross-platform, and the backends behind them) owned by one accountable team.
Native iOS Development
High-performance iPhone and iPad apps built with Swift and SwiftUI. We handle App Store submission, Apple privacy nutrition labels, and the App Tracking Transparency expectations UK users now take for granted.
- Swift and SwiftUI
- App Store submission and review support
- Apple Pay and Sign in with Apple
Native Android Development
Robust Android apps in Kotlin with Jetpack Compose, tested across the device mix UK users actually carry. Google Play Data Safety declarations and Play Store policy compliance handled end-to-end.
- Kotlin and Jetpack Compose
- Google Play Data Safety compliance
- Material Design 3
Cross-Platform with Flutter & React Native
One codebase, both stores: the cost-effective route for UK startups validating an idea or shipping to iOS and Android together. We pick Flutter or React Native based on your roadmap, not our habits.
- Flutter and Dart
- React Native and TypeScript
- Single shared codebase
Mobile MVP Development
Ship a tightly scoped first app rather than overbuilding, solid foundations from day one. Ideal for UK founders running pilots, raising a round, or applying for Innovate UK grant funding.
- Scope mapped to the real problem
- Store-ready launchable slice
- Clear deliverables and timeline
App Modernisation & Retainers
Improve an app already live with paying UK users: performance fixes, UX polish, OS-version upkeep, and feature expansion without destabilising what already works.
- Legacy app migration
- Performance and crash-rate fixes
- Ongoing iteration alongside your team
Mobile Backends & API Integration
The backend that powers your app (APIs, auth, push, and real-time sync) hosted on AWS eu-west-2 (London) when UK data residency matters to your buyers or regulator.
- REST and GraphQL APIs
- Push notifications and offline sync
- AWS eu-west-2 (London) hosting
Native or Cross-Platform? How to Decide
The biggest early decision, and the one that drives cost and timeline. Here's the honest version. Most UK startups should start cross-platform; some apps genuinely need native. We help you make the call in discovery, before any budget is committed.
Choose cross-platform (Flutter / React Native) when…
- You want iOS and Android live together from one codebase
- You're shipping an MVP, a pilot, or validating demand on a UK startup budget
- Your app is content, commerce, workflow, or CRUD-driven
- Speed to market matters more than platform-specific polish. One shared codebase is usually far more cost-effective than two native builds
Choose native (Swift / Kotlin) when…
- You need the absolute best performance or heavy device hardware use
- AR, advanced camera, Bluetooth, or real-time graphics are core to the product
- You depend on day-one access to the newest iOS or Android OS features
- A platform-perfect feel is a genuine competitive differentiator
How We Start: Fixed Scope, Fast
We don't lead with open-ended retainers. Every engagement starts with a focused, fixed-scope sprint, so you get a clear deliverable and a real estimate before any long-term commitment.
App Discovery Sprint
- Scope, user flows & platform recommendation
- Native vs. cross-platform decision
- Architecture, timeline & fixed estimate
Mobile MVP Sprint
- Launchable iOS + Android build
- Core user flow, backend & analytics
- App Store & Play Store submission
App Rescue & Audit
- Full codebase & release audit
- Crash, performance & security fixes
- Stabilised build + modernisation roadmap
Every engagement starts with a fixed-scope sprint and a clear deliverable, billed in GBP via Stripe or GoCardless, with senior engineers you talk to directly.
Why UK Teams Work With Us
Four reasons UK founders and product teams choose MicroPyramid for mobile over a local London agency or a generic offshore team.
Morning Standups During UK Hours
We maintain roughly 4.5 hours of daily overlap with UK working hours. Your team gets live standups, same-day decisions, and pull-request reviews before your afternoon, not responses you wake up to the next morning.
UK GDPR & ICO-Aware Delivery
We build to the UK GDPR and the Data Protection Act 2018 (regulator: the ICO). App permissions, analytics, App Store and Play Store privacy declarations, and data storage are decided with ICO compliance in mind. AWS eu-west-2 (London) available for UK data residency.
GBP Billing via Stripe or GoCardless
Invoices in GBP, collected via Stripe or GoCardless Direct Debit. No currency-conversion headaches, no wire-transfer friction. Billing that fits how UK businesses actually operate.
Senior Ownership, Not a Ticket Mill
Founders and senior engineers own every engagement directly. You will not be passed down to a delivery layer of junior developers. The person you meet in discovery is the person building your app.
How a UK App Engagement Works
A focused four-stage process with weekly demos and senior review, so you always know exactly where your app stands.
Clarify the App Problem
We define the real user or business problem (and which platforms genuinely matter) before any implementation begins.
Scope the Right Version
We prefer shipping a focused first app over an oversized plan: the smallest valuable version, native or cross-platform, with a fixed GBP estimate.
Build App & Backend Together
AI-assisted, sprint-based delivery with weekly demos and senior review: the mobile app and the backend that powers it, never fragmented across contractors.
Ship to the Stores, Then Iterate
App Store and Play Store submission, monitoring, and ongoing improvement so the app stays useful for your UK users.
The Stack We Build On for UK Delivery
Native, cross-platform, and AWS eu-west-2 (London) backends for UK data residency.
iOS
Android
Cross-Platform
Backend & Cloud
Proof, Not Just Promises
12+ years building software, 50+ projects delivered, and long-term clients who keep coming back, including UK teams like Bough Digital. See how we build across product engineering and AI.
"Ashwin and MicroPyramid have consistently and professionally delivered to my ever-changing specifications. Project changes are met with cheerfulness and enthusiasm. They are quick to deliver and have an in-depth knowledge of the industry."
"MicroPyramid took ownership of the build end-to-end and delivered a polished, reliable product. They communicate clearly, hit their timelines, and genuinely care about the outcome rather than just closing tickets."
Bough Digital
UK-based digital agency platform: campaign management, client dashboards, and analytics built for a demanding UK agency client.
UK client story
Refactored
Interactive Python learning platform with AI-assisted exercises and progress tracking, complex product engineering across web and mobile-friendly delivery.
Read case study
PRO Music Tutor
Premium online music learning platform connecting students with world-class instructors across devices, full-stack, mobile-friendly delivery.
See portfolio
CREDITABLE
Employee financial wellness platform for savings, loans, and workplace financial services, fintech-adjacent product engineering.
See more workUK Mobile App Development FAQs
Straight answers to what UK founders and CTOs ask us before starting an app project.
What drives the cost of a mobile app?
The main cost drivers are scope and number of core features, whether you build native or cross-platform, how much backend and third-party integration is involved, and the level of compliance required. We scope the smallest valuable version first, then give a fixed estimate after a short discovery sprint, billed in GBP via Stripe or GoCardless, so you know the number before any build commitment.
How do you keep costs lower than a typical UK agency?
Senior engineers do the work directly (there is no junior-bench markup and no account-management layer), and we use AI-assisted engineering across coding, testing, and review to ship in weeks rather than months. You get senior-led delivery and full code and IP ownership, scoped and estimated up front so there are no surprises.
How long does it take to build a mobile app?
We ship a launchable MVP in roughly 4-8 weeks and larger apps in a few months, faster than the 6-12 months many UK agencies quote, because we use AI-assisted engineering across coding, testing, and review with senior oversight on every change.
Should I build native or cross-platform?
Choose cross-platform (Flutter or React Native) for most apps (MVPs, content, commerce, and workflow apps) to ship iOS and Android together from one codebase, which is far more cost-effective than two native builds. Choose native (Swift or Kotlin) when you need maximum performance, heavy device-hardware use like AR or advanced camera, or day-one access to the newest OS features. We help you make this call in discovery, before any budget is committed.
Are you UK GDPR and ICO compliant, and can you keep data in the UK?
Yes. We build to the UK GDPR and the Data Protection Act 2018, with the ICO as regulator. App permissions, analytics, and App Store and Play Store privacy declarations are handled with compliance in mind, and we can host your backend and data on AWS eu-west-2 (London) when UK data residency matters to your buyers or regulator.
Do you build both iOS and Android?
Yes. We build native iOS (Swift/SwiftUI), native Android (Kotlin/Jetpack Compose), and cross-platform apps with Flutter or React Native, and we handle both App Store and Google Play submission, including the UK privacy and data-safety declarations, for you.
Who owns the source code and the app store accounts?
You do. You retain full ownership of the source code, IP, and your own Apple and Google developer accounts. We sign NDAs and IP-assignment agreements before work begins.
Can you take over or rescue an app another team built?
Yes. We audit the codebase and release, stabilise crashes and performance issues, and modernise the architecture incrementally, without a risky full rewrite. Many UK engagements start as an app rescue and audit before moving on to new features.
Explore Related Services
Specialised engineering teams for the platforms and stacks your UK app depends on.
Ship Your Next App for the UK Market
If you need a senior-led mobile team with UK working-hours overlap, GBP billing, and UK GDPR-aware delivery, we're ready to talk. No junior handoffs, no ticket mills. Just focused app development for UK teams.