Mobile App Development Services

We are a mobile app development company trusted by global brands and disruptive start-ups to deliver worldclass mobile experiences, winning a few awards along the way. Our UK-based app developers work across the entire app development lifecycle, from wireframing and design, right through to building, releasing, and maintaining some of the most popular apps available across Google Play and the AppStore.

View Our Work for <em class="highlight">Mobile App</em> Development Services
In in-app revenue
Mobile applications
Trustpilot 5* Reviews

Mobile App Development Services For Every Device


Optimised for optimum native performance on Android OS, we take advantage of the latest Google technologies 


From Dark Mode to Augmented Reality, we build up the limit of what’s possible with Apple’s rich native ecosystem

Flutter Development

Using Google’s flagship SDK Flutter our team are able to deploy cutting-edge mobile apps for both iOS and Android from a single codebase

Enterprise App Development

Our mobile app development services teams are well versed in tackling regulatory requirements, security standards and working with multiple stakeholders to truly understand business objectives and processes.

Alongside delivering standalone native apps, our mobile app developers also work with organisations to create apps that are deeply integrated into wider web applications and software platforms. Our API-first approach allows us to develop rich software ecosystems that seamlessly work together.

We like to get involved as soon as possible and are happy to work with you as the specification is being produced to lend a helping hand in defining requirements.

Solutions Across the Mobile Ecosystem


We design and develop mobile applications that are uniquely tailored to individual business needs and objectives. Our robust development process starts with a comprehensive understanding of a business: its staff, industry and customers. This insight is used to identify opportunities for growth, efficiency gains, and innovation. We then decide how to best exploit each opportunity and outline the solution, the ROI it will generate and what the development roadmap should look like.


We have extensive experience integrating mobile applications into wider software ecosystems and back-office applications, including CRMs and ERPs. We also develop mobile platforms alongside browser-based applications to ensure consistency across mobile and desktop. Our API first approach also allows us to build platforms with powerful data integrations, unlocking unlimited growth and efficiency for your organisation.


Using industry-recognised methodologies we take a comprehensive look at your target users' needs, motivations and objectives. Leveraging qualitative and quantitative data to inform our UX/UI process, we create prototypes and mock-ups that allow us to fully test, observe and learn how users will respond to your mobile application. This validated information is then fed into the branding, usability, functionality and design of your mobile app.


Our impact doesn't end with launch. We work with clients to understand their business objectives and KPIs, which then inform our analytics strategy and data reporting plans. From day one, we collect meaningful data on your app's performance and user engagement, allowing us to clearly see what's working and what needs improvement. We directly feed this back into feature development and your product roadmap, ensuring that insight leads to action and ultimately impact.

Start-up App Development

We love working with startups providing them with mobile app developers suited to their needs and using our wider expertise and experience to assist in shaping and moulding the digital direction of breakthrough new businesses. 

We've worked with some of the UK's most exciting mobile-first start-ups, helping them step-by-step to transform their ideas into an MVP or fully fleshed-out product. Alongside providing product development services, we can also support you when it comes to finding and securing funding using our extensive investor network and Ventures programme.

The journey doesn’t end after launch either. Our team works with a number of businesses on an ongoing basis to define, design and build new features to drive exponential user and revenue growth.

Thinking About Your Next Mobile App?

Why Build A Mobile App?

Create New Revenue Streams

Mobile applications can open up multiple avenues to expand your revenue. From providing subscription services to in-app purchases, there are multiple ways you can add value to users willing to pay for it.

Reward Loyal Customers

Mobile loyalty programmes can be used by any business to build better customer relationships and grow brand loyalty. By leveraging mobile-first solutions powered by real-time data, you can provide personalised perks directly to your customer's fingertips.

Engage Your Audience

Consumers want more than good products and services, they want to be able to engage with your brand anywhere, anytime. Reach your audience with highly responsive mobile solutions that can be accessed from any device.

We Deliver Impact


From reducing technical debt to introducing robust process automation, we identify and upgrade manual or laborious tasks to slick automated processes, allowing your staff and customers to focus on what matters most


We build mobile solutions that are explicitly designed to streamline operations and deliver substantial cost savings. Our team will dive into your challenges and opportunities to identify the right problems, build the best solution then continuously monitor and upscale the impact on your KPIs.


By clearly understanding your product roadmap and commercial objectives, we always investigate, prioritise and deliver the features that are going to leave competitors racing to catch up. Our focus is on getting you exactly where you need to be in the fastest, simplest way, not maximising our build times or bloating budgets.

Increase Profit

We identify clear opportunities for businesses to improve their bottom line through the development of new mobile-focused customer propositions. We turn mobile app product and service ideas into tangible applications that are optimised for profitability and on-going performance.

Our Industry Expertise


Fintech apps have democratised access to financial services, but building them correctly isn’t an easy task. With deep expertise in security, third-party integrations and regulatory compliance, we build FinTech apps that delight users and drive forward digital services. 


Whether you’re a healtech start-up embarking on the journey to develop your first app or an established organisation looking to deliver a better mobile experience, we understand what it takes to deliver technology that genuinely changes lives.


Looking to build the next Airbnb? Developing, deploying and growing peer-to-peer apps takes more than connecting two sides of a marketplace. With proven expertise growing the UK’s biggest parking platform, we can help you get to market and become the category leader.


From mobile eCommerce to accurately managing inventory, mobile apps can be leveraged by retailers to improve customer experience and organisational efficiency. We help retailers uncover and deliver the mobile-first strategies that will make an impact.

Our Platforms

Native App Development

The term native app development refers to building a mobile app exclusively for a single platform using platform-specific development languages such as Java, Kotlin or Swift. We can help you build optimised native apps for iOS and Android utilising the latest platform features and device functionalities.

Find out more about iOS and Android development.

Cross-Platform/Hybrid App Development

Cross-platform development, also known as hybrid development, enables us to build a single application that can run on various operating systems, instead of developing different versions for each platform. We built some of the UK’s first commercially available cross-platform apps and continue to deliver exceptional cross-platform experiences.

Find out more about Flutter development.

Our App Development Process


Why Choose Netsells as your Mobile App Development Agency?

Contact Our Team

Committed Partners

Our team is never satisfied with delivering the bare minimum against a brief. That just doesn’t cut it for us. We take the time to work with you to plan and develop sustainable, long-term solutions that deliver real, measurable results.

Cross-Industry Expertise

From innovative start-ups to large, established household names, our team has worked globally across some of the most exciting and advanced industries. We’ve seen first hand what it takes to build the best mobile apps on the market and are happy to share our insider secrets to help you succeed.

Commercially-Driven Approach

We don’t build complex when simple will do. Our approach to app development is focused on the minimum incremental change required to deliver the maximum impact. We spend just enough to iteratively show you that we’re moving in the right direction, giving you the confidence to keep investing.

Obsessed With Metrics

We approach projects by goals and objectives, not purely by features. This ensures your roadmap is always focused on moving the needle and pushing your business forward where it counts.

Flexible Resourcing

With expertise and capacity across product, development and delivery, we can adjust our offering to fit your needs like a jigsaw. We typically get the best outcomes for our clients when we own the entire project end-to-end.

Putting Users First

We minimise business risk by putting the end-user at the centre of everything we do. This allows us to validate hypotheses quickly and early in our process and obtain valuable information that influences the product direction for the better.

Our Technology Stack



Since its release in 2014 we have been using Swift, Apple's intuitive programming language for building apps for iOS, Mac, Apple TV and Apple Watch.

Flutter Developers..


Supporting material components and native widgets, Google's SDK Flutter offers near-native performance on iOS and Android from a single codebase.



We use Java-based Kotlin as our language of choice to make our Android apps more maintainable, concise and error-free.

Web & App Developers Based In York


Head Office Suite 2, Mill House, North Street, York, YO1 6JD

Tel: 01904 217026


See Our Mobile Work

Thinking About Your Next Mobile App?