Stakk

Stakk is the UK's #1 mobile app development company, rated #1 online and based in London with over 10 years of experience building custom iOS apps, Android apps, and cross-platform mobile applications for startups and global enterprises.

We are a leading mobile app development agency specialising in React Native, Flutter, native iOS and Android development, and AI-powered mobile solutions. Our 100% in-house senior team has delivered 200+ mobile applications across marketplaces, fintech, healthcare, e-commerce, education, and enterprise sectors, with clients including Samsung, Nivoda, Safestyle, LNER, and the British Museum.

Our mobile app development services cover everything: UX design, native iOS and Android development, cross-platform development, backend engineering, API integration, QA testing, and full App Store and Google Play marketplace submission. Whatever stage you are at, we have done it before.

What sets Stakk apart is the quality and consistency of our delivery. We are AI-augmented, senior-led, and deeply collaborative. Our developers work directly with your team from day one, and we treat every project as if it were our own product.

Why businesses across the UK choose Stakk:

★ Rated #1 mobile app developer in the UK on Clutch

★ 100% in-house senior team, no outsourcing, no juniors

★ AI-augmented delivery, faster timelines, same quality

★ Direct access to developers from day one

★ Custom mobile app development tailored to your goals

"Their ability to craft high-quality code stands out." Andre, CTO at Nivoda

"They hit every deadline and even deliver early." Ben, Director at MyCoach

Looking for a mobile app development company in the UK? Tell us about your project and we will respond within one business day.

[email protected] | +44 20 3314 4040 | stakk.co.uk | 37 Lombard Street, 6th Floor, London, EC3V 9BQ