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UK No.1 Mobile App Development Company

Stakk is the UK's #1 mobile app development company, rated #1 on Goodfirms 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 120+ 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 Goodfirms
★ 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

United Kingdom United Kingdom
37 Lombard Street, London, London EC3V 9BQ
020 3314 4040
$50 - $99/hr
10 - 49
2016

Why Stakk?

  • UKs number one award-winning agency
  • 120 plus apps, 10 plus years experience
  • UKs number one award-winning agency

Service Focus

Focus of Mobile App Development
  • Flutter - 50%
  • React Native - 50%

Industry Focus

  • Financial & Payments - 35%
  • Healthcare & Medical - 35%
  • Startups - 30%

Client Focus

45% Medium Business
45% Small Business
10% Large Business

Detailed Reviews of Stakk

5.0 2 Reviews
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  • Mobile App Development
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  • Most Recent
  • Rating: high to low
  • Rating: low to high
Write a Review
COO at Yappar
Posted 1 month ago

Stakk delivered an excellent mobile app on time & exceeded our expectations throughout the project.

We had a brilliant experience working with Stakk on our mobile app project. From the very start, the team took the time to properly understand our requirements and translated them into something we're genuinely proud of. They kept us informed at every stage, were quick to respond to any queries, and handled feedback professionally. The final product was delivered on schedule and to a very high standard. We wouldn't hesitate to work with them again.

What was the project name that you have worked with Stakk?

App Project for tech startup

What service was provided as part of the project?

Mobile App Development

What is it about the company that you appreciate the most?

Their professionalism and attention to detail stood out. The team were proactive, easy to work with, and clearly knew what they were doing. It felt like they genuinely cared about getting it right.

What was it about the company that you didn't like which they should do better?

Honestly, nothing of note. The project ran smoothly from start to finish and any minor questions were dealt with promptly.

Rating Breakdown

  • Quality
  • Schedule & Timing
  • Communication
  • Overall Rating

Project Detail

  • $50001 to $200000
  • Completed
  • Startups
Jack Patrick
Jack Patrick
Posted 1 month ago

Seamless experience from start to finish, producing an app we're thoroughly pleased with.

Stakk were fantastic to work with throughout the entirety of our mobile app project. The team came across as knowledgeable and confident from day one, which gave us a lot of reassurance early on. They managed the whole process really well, keeping us updated without us ever having to chase. The end result speaks for itself a well-built, polished app delivered exactly when promised. We'd have no hesitation recommending Stakk to anyone looking for reliable app development.

What was the project name that you have worked with Stakk?

Mobile app built from scratch for our business, design & dev

What service was provided as part of the project?

Mobile App Development

Describe your project in brief

We brought Stakk on board to develop a mobile application as part of a broader digital project. The scope covered design, development and delivery of the finished product across multiple stages.

What is it about the company that you appreciate the most?

The level of organisation and how smoothly everything was managed. It never felt chaotic or uncertain the team always seemed on top of things and were a pleasure to deal with.

What was it about the company that you didn't like which they should do better?

There's very little to criticise, if anything at all. The whole experience was straightforward and we felt well looked after throughout.

Rating Breakdown

  • Quality
  • Schedule & Timing
  • Communication
  • Overall Rating

Project Detail

  • $50001 to $200000
  • In Progress
  • Consumer Products

Client Portfolio of Stakk

Project Industry

  • Art, Entertainment & Music - 33.3%
  • Education - 33.3%
  • Retail - 33.3%

Major Industry Focus

Art, Entertainment & Music

Project Cost

  • $100001 to $500000 - 33.3%
  • $50001 to $100000 - 66.7%

Common Project Cost

$50001 to $100000

Project Timeline

  • 1 to 25 Weeks - 100.0%

Project Timeline

1 to 25 Weeks

Clients: 7

  • LNER
  • The British Museum
  • Safestyle
  • Lapland
  • Nivoda
  • Sothebys
  • MyCoach

Portfolios: 3

The British Museum Mobile App

The British Museum Mobile App

  • The British Museum Mobile App screenshot 1
$100001 to $500000
20 weeks
Art, Entertainment & Music

The British Museum identified the need for a mobile application that not only embodied simplicity but also exuded elegance. The primary objective was to create a platform that effectively presented a diverse array of conferences and events hosted at the venue.

The application encompasses a user-friendly interface that enables users to explore upcoming events, delve into comprehensive event details, and gain valuable insights into event schedules. Beyond the fundamental requirements, a strong emphasis was placed on incorporating interactive features that fostered engagement between meeting hosts and attendees. This strategic inclusion was anticipated to significantly enhance user participation, ultimately translating into improved attendance and engagement levels for both conferences and events hosted by the museum.

Web App
Arc Maths

Arc Maths

  • Arc Maths screenshot 1
  • Arc Maths screenshot 2
  • Arc Maths screenshot 3
$50001 to $100000
19 weeks
Education

Stakk was contracted by a math education organisation to develop their mobile application using React Native. They utilised a pre-existing design, created the app's code from the ground up, established a connection with AWS, and seamlessly integrated handwriting recognition functionality.

App Store
Nivoda

Nivoda

  • Nivoda screenshot 1
  • Nivoda screenshot 2
$50001 to $100000
20 weeks
Retail

Stakk conceptualised and built a mobile app for Nivoda, successfully achieving feature equivalence with an established website. Their expertise in React Native came into play, seamlessly connecting the app to the website through an API integration.

App Store