Mobile App Development Services
We design and build bespoke mobile apps that turn early ideas into revenue, from MVP to App Store in as little as 4 weeks.
Trusted by industry-leading founders
Who we are
FiftyFive Technologies is a trusted mobile app development company with offices in London, Sweden, Dubai & India that works with founders and businesses at every stage.
We design, build and deploy bespoke mobile apps from initial concept to App Store launch, using proven technology that performs.
Mobile app development services we offer:
We support both new builds from the ground up and existing apps that need to evolve.
Custom Mobile App Development
We specialise in building custom mobile apps designed around your users, your data and your goals. Our leading mobile app developers manage everything from discovery to launch, delivering production ready apps built to perform reliably at scale.
Enterprise App Development
Enterprise grade mobile applications designed around your existing systems, security requirements and the people who use them. From complex integrations to large scale deployments, we deliver mobile apps that work reliably across your entire organisation, ready to scale.
Android App Development
We design and build native Android applications that work flawlessly across the full range of devices, from smartphones to tablets, using modern tooling aligned with Google’s standards. Every app we deliver is robust, maintainable and built to grow with your product, not a one off build that becomes a liability the moment you scale.
iOS App Development
We design and build native iOS applications that are fast, stable and aligned with Apple’s standards, from initial concept through to App Store launch. Our senior iOS app developers focus on clean architecture and smooth UX design that stands the test of time.
Cross Platform App Development
Building separate native apps for iOS and Android doubles your cost and your timeline. We use React Native and Flutter to deliver cross platform applications that perform natively across both platforms from a single codebase. The result is simple: faster delivery, lower costs and a consistent user experience, without cutting corners.
AI Development for Mobile
We integrate AI capabilities directly into your mobile app, making it smarter, more personal and harder to compete with.
App Maintenance, Support & Security
As your user base grows, we evolve your app with new features, optimise performance and keep it secure, all through the same senior developers who built your product from day one — no handoffs, no knowledge gaps, just the reliable support you need.
A mobile-first, people-centred platform built to transform the shared accommodation experience for Drey
Who we work with
Building from scratch or scaling what’s already there.
Founders building their first app
You have an idea for a mobile app and a vision for where it could go.
We’ll help you scope it, design it and build it in a way that gets you to market fast without cutting corners on the foundations.
Fast-growing teams that need more hands on deck
Already got a high-performing app but need helping scaling it? Our developers sit within your team to help take your app to the next level.
Why founders choose FiftyFive Technologies
AI-first, senior-led
We don’t use AI as a shortcut — we use it as a force multiplier.
Every project is led by a senior developer who knows how to build mobile apps that last.
Full lifecycle, in house
From strategy and UI/UX design through to development, QA and deployment, we handle the entire mobile app development process in house. No outsourcing, no handoffs.
30–50% cost efficiencies
Built for the App Store
We build mobile apps that perform in the real world. Fully integrated, rigorously tested and deployed on infrastructure that grows with you.
Transparant process
No black boxes. We work closely with you throughout explaining decisions, flagging trade-offs and making sure what we build actually solves the problem you came to us with.
How we approach mobile app development
01
Discovery & Strategy
Every successful app starts with discovery. We take time to understand your business, your users and your goals, gathering everything our designers and developers need before defining a clear scope, timeline and approach.
02
Design & Prototyping
Before development begins, our team designs the user flows, wireframes and interface, working closely with you at every step. A great app needs a smart, intuitive design that strengthens the connection between your users and your brand.
03
Build & Refine
As an experienced mobile application development agency, we build your app in agile sprints. With daily stand-ups, regular demos and continuous testing by our QA team, you stay informed at every stage.
04
Deploy & Monitor
Once development is complete, we handle the full launch across the App Store and Google Play, managing store submissions and approvals. From day one we track performance and stability closely, catching issues early so your app stays fast and reliable as real users come on board.
05
Ongoing support
Launching is not where it ends. We build long term partnerships, monitoring performance, adding new features and improving your app over time, so it stays relevant, all handled by the same senior team that built it. No knowledge gaps, just reliable support.
Join hundreds of innovative founders
launching products with 55
- 300+ products launched
- 50% efficiency vs traditional development
- Decades of experience across 80+ technologies
- 90% customer retention rate
