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WE ARE ARCH

Website and app developers who build software that performs.

We design & build apps, websites, software and AI solutions.

We are website and app developers at heart. We design and deliver impactful digital products, partnering with ambitious teams to build apps, platforms and services that make a difference.

ABOUT US

A UK based team with nearly 20 years of experience, combining AI-native engineering, design and product delivery to build websites, apps, SaaS platforms and AI solutions that organisations can rely on.

WHO WE ARE

The Team Behind Your Product.

Your product is shaped by the app developers, designers and product people who will build it, from the first workshop to launch. That holds whether a project starts as web development services or as a native mobile build.


Since 2005 we have launched more than 53 products, we are rated 4.7 on Clutch across 30 verified reviews, and we work from Gateshead, Edinburgh and London.


USER FEEDBACK

What our clients think.

Coeliac UK Logo
Finbar Mulholland

Head Of Digital, Coeliac UK

We worked with a huge range of team members and I was really impressed with how up to speed everyone was, as well as their willingness to get the job done.

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Steve Tagg

CPTO, Boilerjuice

We have only just started properly promoting the app but there is growing evidence that conversion is stronger through the app then via the website. Development costs came in on budget - even though the scope for stage 2 changed.

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Will Storr

Founder & CEO, Deploy

Overall, we liked their very attentive service - serious and professional when needed but the project team was fun and enjoyable to work with - the size of business meant we could always get stuff done.

OUR WORK

Software We Have Designed and Built.

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WHAT WE BUILD

The Products We Are Asked to Build Most.

Most projects that reach our app developers are one of four shapes, and each needs a different kind of engineering.


Customer portals and SaaS platforms


These are login-based products people use every day, and speed decides whether they keep using them. Most of this work is web app development.


Only 48% of mobile websites achieved good Core Web Vitals scores in 2025, up from 44% in 2024, according to HTTP Archive's Web Almanac, and Google's Chrome UX Report found only 55.9% of websites passing Core Web Vitals as of May 2026.


We build to pass from day one.


Customer-facing mobile apps


With just under half of all UK web traffic now coming from mobile devices, according to StatCounter (46. 8% in June 2026, against 53.


2% on desktop), the app is often where your customers deal with you most. We build apps worth keeping installed: native where that earns its cost, and one Flutter app development codebase where it does not.


Products with AI inside


Search, automation and personalisation, built into the product from the start.


Our AI software development work begins with the problem the product has to solve, and the same tooling speeds up our own delivery: 90% of developers now use AI in their work, and more than 80% say it has boosted their productivity, according to Google Cloud's DORA report published September 2025.


Regulated and public-sector products


Some products come with legal and clinical obligations that shape them before a single feature is built. Our health tech app development work is the clearest example, where accessibility, data handling and clinical safety shape the build from discovery onwards.


For Turning Point, a social enterprise supporting over 197,000 people, we built a harm-reduction app that is anonymous by design, with a real-time Naloxone service locator.


For Edinburgh Council we consolidated five venue websites into one accessible platform, with Spektrix ticketing built in and the architecture load-tested for peak-time booking.

WHY ARCH

Why Teams Choose Arch.

Few app developers have shipped across the range we have: startups and household brands, councils and national health services, two-person ideas and patient-facing NHS apps used at serious scale. That spread is why a new brief rarely surprises us.


We build for accessibility as standard, which matters when 95.9% of the top one million home pages still had detected WCAG 2 failures, up from 94.8% the year before, per WebAIM's 2026 Million report.


We also care about the numbers your software moves once it is live.


The UK's digital sector now generates £177.2 billion a year, 6.8% of the whole UK economy, and is growing three times faster than the economy overall, according to a February 2026 gov.uk release.

Spectrum showing the range Arch has shipped across, from two-person ideas and startups through councils and household brands to national health services and patient-facing NHS apps at scale

HOW WE WORK

How a Project Runs.

1. Discovery


Three to five weeks with the app developers who will build it. You leave with a scope of work, wireframes and a costed plan.


2. Design


Our UI/UX design services turn the scope into a clickable prototype, so you can change your mind while it is still cheap to.


3. Build


Work lands in small releases you can open and try as the build goes.


4. Test and QA


Accessibility, speed and security are tested before anything goes public.


5. Launch and support


After launch, the same team keeps the product maintained and improving.


What goes into the cost


There is no price list, because two apps that sound alike can be very different builds. Our guide to what an app costs to build walks through the drivers.


Four things move a quote most: the features you need on day one, whether it is web, mobile or both, how much design and discovery it needs, and the systems it has to connect to.


Describe what you have in mind and you will get an honest scope back, with a smaller first version if that makes more sense.

FAQ

Common Questions.

Do you build both websites and apps?


Yes, with one team. A project can be a web platform, an iOS and Android app, or both, designed from the start to work together.


How much does it cost to build an app in the UK?


We quote each project rather than list prices, because scope drives cost more than anything else. A call gets you a number, and the cost note above explains what moves it.


How long does it take to build an app?


Simple builds can take a matter of weeks once discovery is done, and larger platforms run longer. Your dates are fixed in the discovery blueprint before development starts.


Can you add AI features to my product?


Yes, where it helps. We will also tell you plainly when a feature does not need it.


Do you provide support after launch?


Yes. Maintenance and improvement continue after go-live, so you are not left on your own once the product is in use.


Which platforms and technologies do you use?


Our app developers work in native Swift and Kotlin, cross-platform Flutter and React Native, and React, Laravel and PHP on the web. We choose for each product and explain why.


Can we start small?


Often, yes. Kickstart exists for this: a scoped first version that proves the idea, which we build on once it earns its place.


Where are you based?


Gateshead, Edinburgh and London, with clients across the UK and beyond. Most projects run remotely with regular check-ins.

A picture of the arch office with developers working

Work with us.

Got an amazing idea and need a dedicated specialist team to help get it off the ground? Got a thriving business that you’re looking to take to the next level? Get in touch today and see how can work together.

Listed on Google's Flutter Directory.

Our company is now proudly listed on Google’s Flutter Directory, showcasing our expertise in Flutter development services.

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Keep Up With What We Are Learning.

Occasional notes on building software, design and AI. All we need is a valid email address.

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Got an idea? Let us know.

Looking to kickstart your project or find the perfect team to bring your new product to market? Get in touch with us today.