Custom Mobile App Development for UK Businesses
Your business in your customers' pockets. We design and build mobile apps that people actually use - not bloated, template-driven apps that get uninstalled after a week.
Why Go Mobile
Why Your Business Needs a Mobile App
The UK is a mobile-first country. Over 90% of UK adults own a smartphone, and the average person spends more than three hours a day using apps. Your customers are already on their phones - the question is whether your business is meeting them there.
A well-built mobile app gives your business a direct line to your customers. No algorithm changes, no ad spend, no competing for attention in an inbox. When someone installs your app, you are on their home screen - one tap away, every single day.
Mobile apps also unlock capabilities that websites simply cannot match: push notifications, offline access, camera and GPS integration, biometric authentication, and native performance that feels fast and responsive. For businesses that rely on repeat customers, field teams, or real-time data, a mobile app is not a luxury - it is a competitive advantage.
of UK adults own a smartphone
daily mobile app usage per person
higher engagement than mobile web
What We Build
Mobile Apps We Build
Customer-Facing Apps
Apps that put your products and services directly in your customers' hands. We build ordering apps, booking systems, loyalty programmes, and self-service portals that reduce friction and keep customers coming back.
Whether you are a restaurant chain that needs a mobile ordering app, a service business that wants customers to book and pay through their phones, or a retailer looking to build a loyalty programme that actually drives repeat purchases - we build apps that solve the specific problem, not generic templates stuffed with features nobody uses. Every screen is designed around what your customers actually need to do.
Internal Business Apps
Not every app belongs in the App Store. Some of the most valuable apps we build are internal tools for teams in the field, on the warehouse floor, or moving between sites.
We build field service apps that let engineers log jobs, capture photos, and collect signatures on-site. Inventory management apps that work offline in warehouses with poor signal. Reporting dashboards that give managers real-time visibility from their phone. These apps connect directly to your existing business systems - your CRM, your ERP, your database - so data flows in real time without manual re-entry. No more paper forms, no more spreadsheets emailed at the end of the day.
Cross-Platform Apps
Building separate native apps for iOS and Android used to mean double the development time and double the cost. Cross-platform frameworks like React Native and Flutter have changed that.
We build cross-platform apps that share a single codebase across both iOS and Android while still delivering native performance and a native look and feel. Your users will not know the difference - the app feels like it belongs on their device. But behind the scenes, you benefit from faster development, lower costs, and a single codebase that is easier and cheaper to maintain long-term. For most UK businesses, cross-platform is the smart choice, and we will be honest with you about when it is and when native makes more sense.
How We Build Your Mobile App
From first call to launch and beyond, you always know where the project stands.
- 01
Idea & Scoping
We sit down with you and work out exactly what your app needs to do, who will use it, and how it fits into your business. No guesswork - just a clear, costed plan.
- 02
UX/UI Design
We design every screen, every tap, every swipe. You see the full user journey before we write a single line of code, so there are no surprises later.
- 03
Development
Our developers build your app using modern frameworks and clean code. You get regular demos throughout so you can steer the direction as we go.
- 04
Testing on Real Devices
We test on actual iPhones, iPads, Android phones and tablets - not just simulators. We catch the bugs your users would have found first.
- 05
App Store Submission
We handle the entire submission process for both the Apple App Store and Google Play, including screenshots, descriptions, and compliance checks.
- 06
Ongoing Updates
Apps need regular updates for new OS versions, security patches, and feature additions. We offer ongoing support plans so your app stays current.
Connected by Design
Mobile Apps That Work With Your Existing Systems
Most app development agencies build your app in isolation. It looks great on a phone, but it does not talk to anything else in your business. Data gets trapped. Staff end up copying information between systems. The app creates more work, not less.
We are different because we are not just an app agency - we are a software development company. We build the backends, the APIs, and the integrations that make your mobile app a genuine extension of your business. When a customer places an order in your app, it appears in your CRM. When a field engineer completes a job, the data syncs to your reporting dashboard in real time. When stock levels change, your app updates automatically.
If you already have a custom CRM, an ERP system, a database, or any other business software, we can connect your new app directly to it. If your existing system does not have an API, we can build one. And if you need a website that shares the same backend as your app, we build that too.
This connected approach is why businesses come to Nimble IO instead of a pure-play app studio. Your mobile app should make your business run better, not create another silo of disconnected data.
Mobile App Development FAQ
How much does a mobile app cost in the UK?
Costing for custom mobile apps depends on complexity, the number of platforms (iOS, Android, or both), and whether the app needs to integrate with existing systems. A simple customer-facing app with a handful of screens will sit at the lower end. A complex app with real-time data, payment processing, and backend integrations will be higher. We always provide a fixed quote before any work begins - no hourly billing and no surprise invoices. Get in touch for a free, no-obligation estimate.
iOS, Android or both?
That depends on your audience. If your customers predominantly use iPhones, an iOS-only app might make sense as a starting point. If you need to reach the widest possible audience, we recommend building for both platforms simultaneously using cross-platform frameworks like React Native or Flutter. This approach shares a single codebase across iOS and Android, which reduces development time and cost without sacrificing quality. We will advise you on the best approach based on your target users and budget.
How long does app development take?
A straightforward app with core functionality typically takes 8 to 12 weeks from scoping to App Store submission. More complex apps with extensive integrations, custom backends, or advanced features like real-time tracking or payment processing can take 16 to 24 weeks. We give you a realistic timeline during the scoping phase and keep you updated with weekly demos throughout development.
Do you handle App Store submission?
Yes, completely. We manage the entire submission process for both the Apple App Store and Google Play Store. This includes preparing App Store screenshots, writing descriptions, configuring metadata, handling the review process, and addressing any feedback from Apple or Google. We have been through this process many times and know exactly what the review teams look for, so your app gets approved first time.
Can the app connect to my existing software?
Absolutely - and this is where we differ from most app development agencies. Because we are a full-stack software development company, we can build APIs and integrations that connect your mobile app to your existing CRM, ERP, database, or any other system your business relies on. If your current software does not have an API, we can build one. Your app will not be an island - it will be a fully connected extension of your business.
Ready to Build Your Mobile App?
Tell us about your app idea and we'll come back to you within 24 hours with honest advice on the best approach, a rough timeline, and a ballpark cost. No obligation, no hard sell.