Mobile App development services in the UK
UK-wide delivery. iOS, Android, and cross-platform apps that ship on time, on budget, and deliver real ROI.
Steer73 provides end-to-end mobile app development services for UK businesses, including Discovery and strategy, UX/UI design, native iOS and Android development, cross-platform development, backend and API integration, QA and launch, and ongoing support & maintenance.
We work with SMEs, mid-sized companies, and enterprise clients across the UK, with over a decade of track record and a free Discovery service that lets you identify the right solution before committing to a budget.
Our mobile app development services
Eight services covering every stage of the mobile app lifecycle. Whether you need a Discovery project to validate an idea, a development partner to ship a new app, or a team to take over and improve an existing one. These are the services Steer73 delivers across the UK.
01
App discovery & strategy
Free workshops that turn ideas into prioritised requirements before any code is written.
02
UX/UI design & prototyping
User research, journey mapping, and interactive prototypes that validate the experience before development begins.
03
Native iOS development
Swift-built iOS apps for iPhone and iPad, optimised for Apple App Store guidelines and iOS performance.
04
Native android development
Kotlin-built Android apps for Google Play, designed for Material Design and Android device diversity.
05
Cross-platform development
Flutter, React Native, and .NET MAUI apps that share a single codebase across iOS, Android, and beyond.
06
Backend & API development
Scalable .NET back-ends, third-party integrations, and cloud infrastructure powering your mobile app.
07
QA, testing & app store launch
Manual and automated testing, App Store and Google Play submission, post-launch monitoring.
08
App maintenance, support & modernisation
Performance optimisation, OS updates, security patching (including taking over apps built by other agencies).
Mobile app development services explained
How each of the eight mobile app development services work in practice.
01/08
App discovery & strategy
Every Steer73 mobile app project starts with Discovery, and it’s often free. Over short, focused workshops with your team, we map the problem you’re solving, define the users you’re solving it for, and translate both into a prioritised set of mobile app requirements.
The output is an Epic-level plan you can use whether you build with us or elsewhere. Discovery also gives you a defensible cost and timeline estimate before you commit to a budget, removing the single biggest risk in any mobile app project: starting without knowing what you’re really building.
02/08
UX/UI design & prototyping
Mobile apps live or die on the first ten seconds. Steer73’s designers blend user research, journey mapping, and behavioural analysis to identify what your users actually need, then translate that into interactive, high-fidelity prototypes you can test, validate, and iterate on before a line of production code is written.
Design is included in every mobile app development engagement, not billed separately. You’ll see your app working on real devices weeks before development is finished, with the chance to course-correct while changes are still cheap.
03/08
Native iOS development
For projects where iOS-specific performance or deep platform integration matters, we can build native iOS apps in Swift. That includes apps leaning on iOS-only frameworks (HealthKit, ARKit, CallKit, App Clips), apps targeting the full range of iPhone and iPad hardware, and apps where Apple Pay or Apple Wallet integration is part of the product.
Our iOS app development covers everything from build through App Store submission to ongoing iOS version compatibility.
04/08
Native Android development
When your audience is global, when device fragmentation matters, or when you need deep integration with Android-specific features (background services, custom keyboards, Google Pay, Firebase, AR Core), we can build native Android apps in Kotlin. Steer73’s Android developers ship apps that perform across the full reality of Android, from flagship Pixel devices down to the budget hardware that dominates emerging markets.
We handle Google Play submission, store listing optimisation, and ongoing Android version compatibility as part of every engagement.
05/08
Cross-platform development
In most cases launching on iOS and Android from a single codebase is the right choice, saving meaningfully on development cost, getting to market faster, and reducing complexity. We build cross-platform app development solutions in Flutter, React Native, or .NET MAUI. Cross-platform is the right choice for MVPs, content-heavy apps, and apps where development speed matters more than squeezing the last 5% of native performance.
We’ll help you decide between cross-platform and a native build during Discovery, with no agenda either way. See our dedicated cross-platform app development page for more
06/08
Backend & API development
Many mobile apps are only as good as the backend behind them. Steer73 builds secure, scalable .NET back-ends and integrates them with the third-party systems your app depends on such as payments (Stripe, PayPal, Apple Pay, Google Pay), authentication (OAuth, Firebase, Okta), CRMs (Salesforce, Microsoft Dynamics, Oracle), and proprietary internal systems.
We architect for the load you expect at launch and the load you’ll see in eighteen months. If you’ve ever launched an app that crashed under real-world traffic, you’ll appreciate that distinction.
07/08
QA, testing & app store launch
QA is part of every Steer73 build, not a phase tacked on at the end. Our QA specialists run manual and automated test cycles throughout development, catching issues while they’re cost-effective to fix. When your app is ready, we can handle the submission process end-to-end: App Store and Google Play approval, store listing optimisation, screenshots, descriptions, and first-week performance monitoring. If a store rejects something, we can work directly with Apple or Google to resolve it, so your launch date isn’t held hostage to a review queue.
08/08
App maintenance, support & modernisation
Mobile app development services in the UK shouldn’t end at launch, and at Steer73, they don’t. Once your app is live, we provide ongoing support covering performance optimisation, security patching, OS version compatibility, and feature evolution.
We also take over apps originally built by other agencies. If you’ve inherited an app that’s slow, expensive to maintain, or stuck on an outdated framework, our modernisation team can audit, improve, or rebuild with minimum disruption.
The goal across maintenance and modernisation is the same: an app that keeps delivering ROI five years after launch, not just five months.
Technologies and frameworks we use
For most projects, we work with a focused set of frameworks chosen for performance, longevity, and the size and quality of their developer communities.
Native iOS
- Swift
Native Android
- Kotlin
Backend
- .NET
- Node.js
Integrations
- Stripe
- Apple Pay
- Google Pay
- Salesforce
- Oracle
- Microsoft
- Dynamics Firebase
- OAuth
- Okta
Choice of framework is one of the decisions we work through with you during Discovery, not a default we apply to every project.
Some apps are best built native; others are best built cross-platform. The right answer depends on your users, your budget, your timeline,
and where you want the product to be in three years, but increasingly cross-platform is the correct choice.
UK businesses we build mobile apps for
We’ve built mobile apps and systems for clients across most major UK industries. Each has its own constraints, whether that’s regulatory, technical, or customer expectations. Every Steer73 engagement starts by understanding them before any design or code is touched.
Restaurant ordering apps, loyalty programmes, POS integrations
Mobile commerce apps, retail companion apps, loyalty
Compliance apps, payment apps, advisor and broker tools, portals
Production apps, field operations, customer-facing tools
Site management apps, safety reporting, workforce management
Fleet management, delivery driver apps, warehouse tracking
If your industry isn't listed,
talk to us anyway.
The nuance usually lives in the business requirements, not the industry.
The most useful precedent for your challenge often comes from a completely different sector that faced the same problem. Our cross industry experience will help you find the optimal solution to whatever challenge you’re trying to solve.
If your industry isn't listed,
talk to us anyway.
The nuance usually lives in the business requirements, not the industry.
The most useful precedent for your challenge often comes from a completely different sector that faced the same problem. Our cross industry experience will help you find the optimal solution to whatever challenge you’re trying to solve.
Mobile apps we've built
Steer73’s mobile app development services have shipped apps for businesses across the UK. We have never failed to deliver a project.
Two of the most well-known are below.
CAMILE — RESTAURANT ORDERING APP
Drives over 50% of Camile's sales
Camile, a Thai restaurant chain, had outgrown the third-party ordering platform they relied on and decided to build their own. They asked Steer73 to design and develop a custom ecommerce mobile app that gave them ownership of the customer relationship, and a real competitive advantage in the takeaway market. The app went on to drive over 50% of Camile’s sales, opening new opportunities for loyalty, customer analytics, and cross-sell. We continued to roll out features for Camile years after launch.
PADDY POWER— RETAIL COMPANION APP
A core engagement tool across 600+ retail stores
Paddy Power needed a digital experience for the customers who still bet in brick-and-mortar shops. To move quickly, the first version was a mobile-web MVP that felt like a native app, validating the value proposition in months, not years. Once proven, we developed it into a full native mobile app with additional features such as event streaming and free-to-play games.
How we deliver mobile app development services in the UK
Discovery first. Three engagement models. UK-wide delivery from a London base.
Discovery first, and it's free
Every Steer73 project starts with a Discovery project, which is usually free. Short, focused workshops with your team take you from initial idea to an Epic-level plan you can use to scope budget, timelines, and technical approach, whether you build with us or someone else. It’s the lowest-friction way to accurately design a mobile app solution.
Flexible engagement models
We work three ways: fixed-price Waterfall for projects with fixed scope, time & materials Agile for evolving scope within a set budget, or a managed service model that embeds a dedicated team for ongoing relationships. The right model depends on your project, we’ll recommend one during Discovery.
UK-wide delivery
Our office is at 167-169 Great Portland Street in central London. Our delivery model is remote-first, with in-person workshops at your offices or ours when it matters. We work with clients across the UK, and distance has never been a barrier to a successful mobile app project.
Why UK businesses choose Steer73 for mobile app development services
A decade of UK app development, an in-house senior team, and a delivery record that’s never failed.
10+ years of UK app development
Building mobile apps since 2014 for UK SMEs, mid-sized businesses, and enterprises. The cumulative track record has enabled us to develop a guaranteed process for delivering mobile app projects.
We've never failed to deliver a project
Every Steer73 project has delivered ROI, across more than a decade. Our proven delivery methodology, senior-only teams, and proprietary Digital Transformation platform are why, and the case studies above are the evidence.
In-house team, not outsourced
UI/UX designers, product experts, developers, and QA specialists all work directly under Steer73. The same team designs, builds, tests, and supports your app end-to-end. No handoffs to subcontractors, and no surprise quality drops mid-project.
Mobile app development cost
The cost of Steer73’s mobile app development services depends on five things: app complexity, platform choice
(native vs cross-platform), the depth of design work, the number of integrations, and any regulatory or compliance requirements.
There’s no single price for “a mobile app” but there are experience-based ranges to consider.
PROJECT TYPE
INDICATIVE RANGE
TYPICAL TIMELINE
MVP mobile app
£20k–£50k
2–3 months
Mid-scale app
£50k–£100k
2–5 months
Enterprise app
£100k+
4–6+ months
App takeover & modernisation
£20k–£100k
1–3 months
Ranges are indicative, and real projects vary. Our free Discovery service exists to give you a defensible number for your specific app, not a generic ballpark.
Ranges are indicative, and real projects vary. Our free Discovery service exists to give you a defensible number for your specific app, not a generic ballpark.
Frequently asked questions
The five questions UK businesses ask most often before kicking off a mobile app project with Steer73.
The right choice depends on your priorities: native when extreme performance and deep platform integration matters, cross-platform for a single codebase that ships to iOS and Android at lower cost. We’ll work it out with you during Discovery. Read more about our cross-platform app development services.
Yes, this is a regular part of our work. We usually start with a code and architecture audit, then propose a path forward that may include targeted improvements, a partial rebuild, or a full modernisation onto a new framework. We’ll help you choose the option that delivers the most value for your budget.
Yes. Our office is in central London but our delivery model is remote-first. We work with clients across the UK and Europe. In-person workshops happen at your offices or ours when they matter. For most projects, weekly/bi-weekly remote check-ins, transparent work management tools and clear documentation do the heavy lifting.
The full lifecycle: Discovery and strategy, UX/UI design, native or cross-platform development, backend and API work, QA and testing, app store submission, launch, and ongoing support and maintenance.
A simple MVP can be ready in 2–3 months. A production-quality app with non-trivial integrations can take 3–6 months. Enterprise apps with complex compliance, multiple integrations, or high security requirements may take even longer. Discovery sharpens this estimate, we’ll give you a clear timeline before you commit.
Ready to start your mobile app project?
Tell us about your idea, your existing app, or the problem you’re trying to solve. Our free Discovery service exists to give you a clear plan, a budget, and a route forward, with no obligation to use Steer73’s mobile app development services afterwards.