Top 10 Mobile App Development Companies in London 2025

21Twelve Interactive mobile application development company in London, we know what it takes to have a number one success. With so many application development companies, choose award-winning application developers. In search of a mobile application developer in the United Kingdom, look elsewhere than on this list of the leading mobile application development companies in London.

We have put together this list of UK application developers based on our own research, the suggestions of our network and the classifications and data from other sources and third party sites. The list is not in any particular order, but we have tried to add and cure a series of useful suggestions for the development of applications in the London.

We are a team of top app developers, designers and strategists passionately pursuing the bleeding, hairsplitting, cutting edge of mobile applications for start-ups and enterprise clients that get featured in app stores. At Fueled, we don’t just build apps. We create the kind of apps that people talk about, that they use over and over again. We come to work in the morning to build the best apps for the best clients. It’s what makes us tick.

Zudu is a pioneering digital agency based in the heart of Scotland with a flair for development, conceptualization and digital marketing. We are experts in web and app development and have worked with clients ranging from individuals with great ideas to multinational organizations looking to reinvent and optimize their digital assets.

We are a team of designers and developers that make web and mobile applications for our clients. We aim to create great user experiences powered by well-made software.
During the sales process, we will seek to understand the jobs your users need to be done. When we start a project, we’ll typically run a product design sprint where we create and test a prototype with real people in the first week.
We then design and code while focusing on quality and maintainability. We work iteratively and deploy working code regularly. We have no project managers. Everyone you hire is a designer or developer.

As one of London’s leading mobile app development companies, we were there at the birth of mobile apps. In fact, our apps were some of the first to hit the store in 2007. Since then, we have built long term relationships with a range of corporates and SME’s, helping to refine their processes with a mobile solution. One thing that has remained constant is our company’s total commitment to delivering your project on spec, on time and on budget. As a design-led development team, we ensure that the features and functionality of your app are validated by detailed user research. This way, we can align your business goals with your users’ needs to create the most efficient end product.

We are one of the longest serving, dedicated mobile app development companies in the world. Having built a close-knit team of experts, all based in our York and London, UK offices.
We are a team of digital natives, specifically focused on developing cutting edge, disruptive apps for start-ups or mobile/digital transformation solutions for national and global enterprises. Our developers are platform focused experts in Apple’s iOS, Google’s Android and Facebook’s React native. Supported by our own bespoke BaaS The Core we are perfectly positioned to deliver an end-to-end mobile solution.

At Magora we design mobile and web B2B and B2C applications and bespoke software. We integrate them into fully-fledged business solutions, establishing a strong online presence for your company and maximizing your ROI.
We develop native mobile apps for IOS & Android using Objective C, Swift, Android SDK, AIDE, Android NDK, etc. For special requests, we can also provide cross-platform Xamarin development. For the backend, we utilize PHP, Node.JS, Java, .NET. For the frontend — React.JS, Angular.JS, and JS. We provide adequate safety and quality assurance by default.

Clock is an award-winning digital design and build an agency with two decades of experience building high quality, highly performant, bespoke digital platforms, from websites and loyalty platforms to apps.
Our team of 40 – made up of design and UX specialists, front-end and back-end developers and technical services – have successfully built digital products and platforms that bridge the gap between the physical and digital worlds, whether our clients goals are customer retention and loyalty, engagement, revenue generation, workflow optimization or digital transformation in its many facets.

INGIC is a results-driven mobile app strategy, design, and development company focused towards high conversion rate through custom development. The company comprises of the most talented, skilled and experienced professionals from the industry. We transform simple ideas into great products. Our aim is to convert a simple creative thought into robust functional solutions that speak for itself.

Pulilab is an international creative software and digital media agency that offers innovative solutions crafted by talented developers and designers in Budapest. We are driven by our mission to innovate and create powerful products. With each new project, our goal is to deliver a custom, cutting-edge solution that delights our clients. At our core, we focus on building innovative and effective products based on best-in-class practices. We stay on top of our game by bravely venturing into new areas to find interesting problems to solve; some of which evolve into separate ventures. This gives us the opportunity to learn hands-on how to build and grow disruptive products and services.