Mobile app development in the UK

Whether you have a new mobile app idea you want to see become a reality or an existing app you want to extend or improve, Add Jam is ready to deliver. We have a proven track record of designing and building excellent experiences on iOS, Android, and cross-platform React Native apps for startups, public sector organisations, charities, and established businesses across the UK.

React Native expertise

Add Jam has over 8 years of experience delivering mobile apps using React Native. These apps have scaled to thousands of users and have been featured in the App Store and Google Play. We'll guide you in building a cross-platform app that works brilliantly on both iOS and Android, saving you time and money.
React Native expertise

Access native platform features

Modern mobile platforms are massively powerful. We'll show you how to utilise features such as CarPlay, Android Auto, HealthKit, MapKit, push notifications, Wallet, and widgets to create a seamless and integrated user experience.
Access native platform features

Swift development and Kotlin development

We excel at building native iOS apps powered by Swift and Android apps written in Kotlin. Let us create a native app that takes advantage of the latest features and APIs on iOS and Android.
Swift development and Kotlin development

Mobile app design and ASO

We believe in fast, frequent feedback. Together we'll build a rapid prototype to test your idea with real users and stakeholders. We utilise tools such as Figma to get ideas down quickly and iterate on them based on end-user feedback.
Mobile app design and ASO

Mobile development projects by Add Jam

We deliver mobile apps that offer a brilliant user experience whilst being reliable, accessible and secure. Our plug in team of expert mobile app developers will guide you in shipping iOS and Android apps utilising the latest technologies and best practices. React Native cross platform and fully native apps.

PEM Diary - ME/CFS Crash Log

Healthcare

Social Impact

PEM Diary - ME/CFS Crash Log

PEM Diary is a React Native mobile app designed to help individuals with ME/CFS track and document PEM episodes. Built from personal experience, this app serves as a handy tool to understand your condition

One Walk A Day

Health

Fitness

One Walk A Day

During lockdown we rapidly prototyped a health and wellbeing app using React Native then expanded on the concept and redeveloped using SwiftUI

Urban Fox - near home EV charging

Mobility

Electric Vehicles

Urban Fox - near home EV charging

Urban Fox is a UK EV chargepoint operator offering a range of near home & car park charging solutions to make the transition to EVs accessible for all.

Glasgow Park Walk

Tourism

Mobility

Glasgow Park Walk

Our app to discover Glasgow's beautiful parks with ease. Available on iOS and Android and translated into multiple languages. Offline with rich media content.

Electric Maze

Education

Electric Maze

Innovative, electronically programmable experiential learning activity. React Native app that interacts with a BLE peripheral on iOS and Android.

Glasgow Subway Crawl: Explore the City's Underground Charm

Tourism

Mobility

Glasgow Subway Crawl: Explore the City's Underground Charm

Discover the ultimate guide to exploring Glasgow using its iconic subway system. Experience all 15 stops in one unforgettable Sub Crawl adventure with our innovative mobile app.

Bypass - EV Fleet Management App

Mobility

Electric Vehicles

Bypass - EV Fleet Management App

The innovative EV fleet management app. Simplify payments, track costs, and enable seamless charging across charging networks. Streamline your electric mobility today.

Property Tracker - companion app for home hunters

Property

Property Tracker - companion app for home hunters

Privacy-focused mobile app for UK house buyers and renters to easily bookmark property listings and help understand the market.

CareFit - helping carers stay fit

Health

Education

CareFit - helping carers stay fit

CareFit is a research project with the University of Strathclyde aiming to support as many caregivers as possible with their health and wellbeing.

Purple Alert

Health

Community

Purple Alert

A community-driven app by Alzheimer Scotland to support people with dementia. Enables quick alerts and community searches when individuals go missing. iOS and Android.

Myrror

Health

Community

Myrror

Track your beauty treatments safely with Myrror. Developed for iOS and Android to allow people to safely track the progression of their aesthetic procedures such as Botox and fillers.

Kapa - Chat app for sports clubs

Community

Health

Kapa - Chat app for sports clubs

Where your sports club lives. Real time chat app for sports clubs and societies on iOS, Android and the Web.

The Loading Bay

Charity

Mobility

The Loading Bay

The Loading Bay is Glasgow's innovative skatepark. Our custom iOS POS app ensures inclusive access, blending history with technology for community empowerment. Learn more.

Pocket Leap

Tourism

Mobility

Pocket Leap

A pioneering offline travel companion and guide to the west coast islands of Bute, Cumbrae, and Arran. Though retired in 2025, its legacy continues to inspire.

Anniversary Urban Walk

Community

Education

Anniversary Urban Walk

Working alongside local school, St Luke's High School, to create a vibrant guide to the town of Barrhead

LoL 2048

Game

LoL 2048

A League of Legends themed clone of the viral hit 2048. Enjoyed by millions of people all over the world.

Kara - meditation app

Health

Kara - meditation app

Meeting cancer with mindfulness. Gorgeous web app delivering meditation content to people living with cancer by the Mindfulness Everywhere team.

Meditation Now - meditation app

Health

Meditation Now - meditation app

Taking mindfulness everywhere. A multilingual mindfulness app by Mindfulness Everywhere. Experience guided meditations in multiple languages, breaking barriers to global wellness.

Glasgow Cycling - Smart City app

Mobility

Tourism

Glasgow Cycling - Smart City app

Making Glasgow a cycle friendly city through open data. Part of the Future City Programme at Glasgow City Council.

Glasgow Walking - Smart City app

Mobility

Tourism

Glasgow Walking - Smart City app

Making Glasgow more active and making heritage information easy to access. Part of the Future City Programme at Glasgow City Council.

Frequently Asked Questions

Should I build a native app or use React Native?
It depends on your needs. React Native is excellent for most apps and lets you ship to iOS and Android from one codebase. Native development (Swift/Kotlin) is better when you need cutting-edge platform features, games, or maximum performance. We do both and can advise on the right approach for your project.
Is building a mobile app worth the investment?
Yes, if your use case benefits from native device features like push notifications, offline access, camera, GPS, biometrics, or a presence on the App Store. Mobile apps also offer better engagement and retention than web apps for many consumer products.
How does the App Store review process work?
Apple and Google review every app submission, typically taking 1-3 days. Reviews check for bugs, policy compliance and content guidelines. We handle the entire submission process and know how to avoid common rejection reasons, ensuring smooth releases.
How long does it take to get an app approved?
Initial App Store review typically takes 24-48 hours for Apple and a few hours for Google Play. However, first-time submissions or apps with complex features may take longer. We factor review time into all release schedules.
Can you update our existing mobile app?
Yes, we regularly take over existing React Native, Swift and Kotlin apps. We'll audit the codebase, identify improvements and either maintain it or modernise it depending on your needs.
How do we get started on a mobile app project?
Book a free 30-minute consultation to discuss your idea. For most projects, we recommend starting with an App Planning Day to define scope, create wireframes and build a roadmap. This de-risks the project and gives you clear deliverables before committing to full development.

We offer a range of services to help ambitious tech projects succeed

Technical support for web and mobile apps

Ensure the continuous performance and reliability of your digital products with our expert support services. We offer dedicated assistance for React web apps, React Native, Swift, and Kotlin mobile apps, as well as Ruby on Rails applications.

Product design, user experience and marketing

Tailored product design and marketing strategies to make your website or mobile app stand out in the crowded marketplace. We can even assist you with branding, user experience, and more.

App store optimisation (ASO)

Enhance your app's visibility and performance in the App Store and Google Play. Our data-driven ASO strategies increase downloads, revenue, and user engagement in 2025's competitive app marketplace.

UK based Ruby on Rails and React web development team

The modern web is a powerful platform that enables us to deliver responsive websites and web apps that enhance your digital presence and user experience. Add Jam will guide you in developing and deploying web applications utilising the latest technologies such as React, Ruby on Rails, push notifications, WebRTC for video calls, and more.

Mobile app development in the UK banner image

Leading mobile app developers based in Scotland, working UK-wide

We take products from an idea to revenue

Add Jam is your plug in team of web and mobile developers, designers and product managers. We work with you to create, ship and scale digital products that people use and love.

Hello, let's chat 👋
michael hayes avatar photo

Michael Hayes

Co-founder of Add Jam

Hey! Co-founder of Add Jam here. I'm available to chat about startups, tech, design, and development. Drop me a message or book a call in my calendar at a time that suits you.