App developers UK: mobile apps built by a senior in‑house team since 2016

App developers UK
mobile apps built by a senior in‑house team since 2016

Start your app development project

Trusted by 100+ startups, scale-ups and enterprise brands across the UK

What does a UK app development agency actually do?

A UK app development agency takes a product idea from concept to a live iOS and Android app — handling UX design, engineering, testing and post‑launch support under one contract. That's different from a freelance developer, who usually covers build only, or an offshore team you manage remotely with limited oversight. Stakk is a 100% in‑house team based in London, working in React Native, Flutter, and native iOS and Android, with 120+ app projects completed since 2016. If you already have a specification, we can scope a fixed price; if you're starting from an idea, we begin with a short discovery phase.

Ready to start your app development project?
Nivoda - Stakk

Nivoda

Global Jewellery Trade Made Simple
British Museum - Stakk

The British Museum

Events and Conferences App
Yappar

Yappar

Interactions curated for Vision Pro
MyCoach - Stakk

MyCoach

PT In Your Pocket
Subconsciously - Stakk

Subconsciously

The No. 1 App for Hypnotherapy
Flash Learning - Stakk

Flash Learning

The All-in-One AI Study Partner

A decade of shipped apps, not pitch decks

2016 Founded — 10+ years building apps
120+ App projects completed
100% In‑house team, no outsourcing
★ Top Rated mobile developer on Clutch

Start your app development project
Design

Journey Mapping
Wireframing
UX/UI
Prototyping

App Development

React Native
Flutter
iOS
Android

Core

AngularJS, ReactJS
Node.js, Python
.NET Core

Emerging

Artificial Intelligence
Augmented Reality
Automation

mobile app developers
MyCoach's director says the team is efficient with workload, consistently delivers ahead of deadline, and communicates in depth throughout.
Ben
Director at MyCoach
Nivoda's CTO describes Stakk as functioning like an internal development team — communicating consistently and producing high‑quality code.
Andre
CTO at Nivoda
"Stakk succeeds in their client-focused attitude. They’re willing to adapt to requests to iterate, and their app developers are available for direct communication as necessary.”
Jay
Director at Volopa
“They have a strong ability to understand all of our evolving concepts and are able to turn them into beautiful designs which convert efficiently.”
Alex
Head of Buying at Mikado Group
“Bringing deep talent and key insights, their app developers team has been such a beneficial partner to our success. Their open communication style and work ethic go above and beyond expectations.”
Naomi
Founder at Headspend
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Take your development forward

Elevate your digital presence with our team of highly skilled developers, dedicated to turning your vision into cutting-edge reality.

    I’m looking for a help with:

    I’m hoping to stay in a cost range of:

    Let’s team up
    and move
    forward together
    +44 20 3314 4040
    hello@stakk.co.uk
    37 Lombard Street, 6th Floor, London, EC3V 9BQ GB
  • © Stakk Limited 2026

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