Mobile app development agency in London
Steer73 is a world-class mobile app development agency based in London, UK. We help SMEs, mid-sized companies and enterprise organisations launch mobile apps faster, with less risk and with a higher ROI than traditional agencies.
We build, launch and manage mobile apps for
Mobile app discovery (free service)
A free project to take you from initial ideas to a clear plan for developing your mobile app in the most effective, cost-efficient way and fastest way.
We don’t build apps for the sake of having a mobile app. Our free discovery service helps you assess the problems you’re trying to solve, review available options, and define your mobile app requirements, to ensure you develop a mobile solution that delivers real value to your company and customers.
Application roadmap development
From proof of concept to MVP to long-term feature development. We help you ideate and map out a roadmap of features and updates, help you prioritise your app backlog and setup the processes required to ensure you develop a mobile app that delivers against your objectives.
Mobile app design & prototyping
We ensure your mobile application is not only functional, but also easy to use and visually engaging. Our User Interface (UI), User Experience (UX), and visual designers will create interactive prototypes of your mobile app to ensure a digital experience that your users love.
Mobile app development
Whether you need an Android App, iOS App, or a cross-platform mobile application, we have a team of some of the best app developers in London and across the world. Our expertise covers everything you need to deliver a high-ROI mobile app on time and in budget, from product to development to QA to project management.
Mobile app user testing
User-focused apps deliver the best results and we understand how essential user feedback is to the success of your mobile application. Our team will ensure you have the data you need to make informed decisions about new iterations, feature development, and version updates.
App support & app store monitoring
Mobile app development is just the first stage of the journey. We ensure your app remains functional and competitive with a suite of app support services, from technical support to app store monitoring, to maintenance. Our goal is to ensure that your mobile app delivers value for years to come.
App modernisation & improvement
Have an existing mobile app that you want to replace, enhance or optimise? We have deep expertise in helping organisations to overhaul their mobile app offerings for better performance, functionality, scalability or user experience. During Discovery and Scoping we will workout how to do this with the minimum disruption and cost to your business.
Our work
With a proven track record of delivering exceptional mobile solutions for enterprise clients, medium-sized businesses and SMEs, we have established ourselves as one of the top app developers in London. Explore some of our mobile app projects below:
Camile
A restaurant ordering app for Thai restaurant chain, Camile.
Our role
Mobile app scoping | App development roadmap | UX/UI design | Mobile app development | App store monitoring | App support | App maintenance | Technical support | App hosting & cost management | App Security & Risk Management | Complex integrations
The work
Having outgrown a 3rd party solution, Camile decided to develop a real competitive advantage by building their own restaurant ordering platform that included at it’s core, a proprietary mobile app.
They turned to our London-based mobile app development team to create an industry-leading mobile app that has gone on to drive over 50% of their sales.
Our team designed and developed a custom ecommerce mobile app that not only streamlined online ordering but also gave Camile ownership of the customer relationship, opening up new opportunities for enhanced engagement, analytics, loyalty and upsell/cross-sell opportunities.
Today, Camile’s app is a cornerstone of their success, helping them stand out in the competitive takeaway market. We continue to collaborate with Camile, rolling out new features and updates to support their long-term growth.
Camile quote
“Steer73 have taken the time to understand our project in detail, and to design and build a best-in-class platform. “ ― Brody Sweeney, CEO
Paddy Power
A retail companion app for all 600+ Paddy Power retail stores.
Our role
Mobile app scoping | App development roadmap | Native mobile app development | UX/UI Design | App store monitoring | App technical support | Mobile app maintenance
The work
The sports betting industry has changed the way it does business in recent years. With intuitive digital platforms, they’ve been able to reach a new generation of customers. However, the industry’s retail sector remains a valuable source of revenue and constitutes an important portion of Paddy Power’s customer base.
For Paddy Power, a significant number of its customers still place bets in brick-and-mortar shops. Paddy Power needed a digital experience to enhance the relationship with these retail customers.
Because Paddy Power needed to move extremely quickly, the MVP took the form of a mobile website with UI and UX that felt like a mobile app rather than building a native mobile app from the start. This saved months of execution and proved the value proposition just the same.
Once the value proposition was proven with positive user feedback, our London app development team developed it into a native mobile app. From there new features have consistently been added such as event streaming and free to play games, all of which enhance the customer experience and deliver greater ROI for Paddy Power.
Paddy Power Quote
“The team at Steer 73 are extremely well versed in their fields and regularly provide informative updates on Technology and external industry trends, which we can translate to benefit our customers and anticipate challenges.
The attention to detail, clarity, quality and pace which Steer73 deliver customer features is outstanding, which creates a working relationship more akin to a joint venture than a supplier/customer standard.” – Paddy Power
Why work with Steer73? A leading app development agency in London
Why work with us?
We help organisations plan, build, launch and manage custom mobile apps without the cost, long timelines or risk of failure typically associated with custom app projects.
As a leading app development agency in London, we blend a deep knowledge of local and international business needs with global digital trends to solve your most pressing challenges. We have worked with a huge range of companies with different budgets to build mobile apps that deliver real value to the organisation, their employees and their customers.
Leveraging 10+ years of app development experience, we can guide you all the way from an initial idea, to an MVP, to a fully-built mobile app, all while ensuring that your app project perfectly balances timelines, functionality and budgets.
We have never had a failed project at Steer73 and we typically form long term relationships with our clients as we continue to help them get an ROI from the apps that we build them for years to come.
Meet us in London or give us a call
London office: Steer73 – App development agency in London
85 Great Portland Street, London W1W 7LT, United Kingdom
Phone number: +44 2038 550 237
Email: hello@steer73.com
We’ve never failed to deliver a project
At Steer73, we pride ourselves on our flawless track record of developing successful mobile apps for our clients both in London and across the world.
We have consistently exceeded expectations across industries by leveraging our proven delivery methodology, our proprietary Digital Transformation Platform, and our top 0.1% talent , to build mobile apps that don’t just meet the immediate requirements but drive long-term business value.
Proven processes
Over the last 10 years, we have honed our processes, templates, frameworks, tech and expertise around building, launching, and managing mobile applications for enterprises and SMEs. Our ability to understand businesses requirements quickly, translate these into technology requirements and help our clients to prioritise and make decisions around what to build, ensures you always build the right thing. From there, we apply our industry leading delivery methodologies to bring your mobile app project to life on time and on budget.
Maximizing ROI
App development is an investment, and maximising your return on that investment is crucial. We’re not just a mobile dev shop. We’re full service product experts. We consider your business needs as well as your users’ behaviours, preferences, and expectations when developing your mobile app. This dual focus allows us to develop mobile solutions that not only provide an exceptional user experience but also align with your objectives, creating real business impact.
London based, global team
While headquartered in London, UK, our team comprises a diverse set of global talent from 7 other countries, bringing a wealth of experience, exposure to various technology stacks, and fresh perspectives that foster innovation. We provide you with the benefits of working with a local company backed by internationally renowned app developers.
Our unique approach to mobile app development
User-centered strategy & app design
Developing a successful mobile app starts with a deep understanding of your users. We invest heavily in user research, journey mapping, and behavioural analysis to discover key pain points and expectations. By aligning these insights with the mobile app project objectives, we are able to design intuitive and engaging user experiences that drive product adoption and retention.
Fast app development underpinned by transparent collaboration
Our Digital Transformation Platform helps you bring your mobile app to life faster, more cost effectively and without the sacrifices usually associated with custom development.
Everything we do in the app development process is designed to keep you in control and ensure you get the mobile app your business needs. We provide complete transparency at every stage, from key decisions to project progress. This includes dedicated tools, regular updates, and in-person workshops—whether at our London location or your place of business.
Ongoing app optimisation, maintenance & support without operational burden on your team
The success of a well-built mobile app isn’t just about launch—it’s about ensuring your app delivers value long into the future. We provide continuous updates, feature enhancements, and support to ensure your mobile app remains competitive and aligned with the latest OS updates, security standards, and user expectations. Our London team continuously identifies opportunities for:
- Performance optimisation – Ensuring speed, stability, and efficiency across all devices.
- Security improvements – Proactively keeping your app protected against emerging threats.
- New feature development– Seamlessly incorporating new features and optimisations as your needs evolve.
How we manage mobile app development projects
Every project is unique, so we tailor our project management models to ensure smooth collaboration, full transparency, and the highest-quality digital product.
With a full in-house team of UX/UI designers, product experts, developers, and QA specialists, we provide end-to-end mobile app development that is transparent, efficient, and tailored to your needs.
Let’s collaborate and build an app that delivers real results for your business!
Choosing the right development method
We offer three key methodologies to best suit your needs:
- Agile Development – Best for evolving projects, Agile breaks development into short, iterative cycles, allowing continuous feedback, adjustments, and faster go-to-market times.
- Waterfall Development – This structured, step-by-step approach ensures clarity, predictability, and fixed deliverables.
- Hybrid Approach – A blend of both, using Waterfall for structured planning and Agile for flexible execution, providing balance between stability and adaptability.
Regardless of the methodology, we keep you informed at every stage with regular updates, progress tracking, and transparent communication.
Flexible engagement models
Whether you prefer fixed-price, fixed-scope engagements or want to embed a dedicated mobile app team within your organisation, we provide the right structure to drive your business forward with tech.
Comprehensive app development services
From ideation to ongoing support, our London-based team provides a full suite of services, including:
✅ Strategy & consultation – Helping you define the best approach for your app’s success.
✅ UI/UX design – Creating intuitive, engaging, and user-friendly interfaces.
✅ iOS & Android development – Native and cross-platform solutions ranging from Flutter to .NET MAUI
✅ Backend & API development – Building secure, scalable, and high-performance app infrastructures.
✅ QA & testing – Ensuring your app is bug-free, secure, and optimised for all devices.
✅ App launch & optimisation – Managing app store submissions and post-launch performance improvements.
✅ Ongoing maintenance & support – Keeping your mobile app updated, secure, and aligned with the latest OS changes.
1. Initial project assessment
The initial project assessment is usually a short call with our London team where we understand your business goals, challenges to overcome, stakeholders, and requirements. This helps us identify the right approach for your mobile app development project and ensures we’re building the right thing from the start.
2. Discovery project
During discovery, we run workshops with your team to build our understanding of the problem, the business case and developing the structure of the solution that needs to be developed. (Output is at the epic level.) This phase ensures, at a high-level, that each aspect of your mobile solution aligns both with your user needs and business goals.
3. Scoping
During Scoping we are working out what you need to do, what are the limiting parameters and what questions we need to answer. (Output is at the feature level).
4. Solution definition
With the scope in place, we’ll begin to design a mobile solution that fits all the established requirements. We are defining how the requirement from scoping will be delivered, exactly how the system will work. (Output is at the task and user story level).
5. Implementation
Here’s where our app developers step in to bring your project to life. We are building what has been defined, the specification is known and fixed. Whether it’s an iOS app, Android app, or a cross-platform mobile app, we build with precision using the latest frameworks and best practices.
6. UAT & launch
We manage the entire launch process, from deployment to submissions on Google Play Store, Apple App Store and other app directories. We provide an easy and stress-free app rollout by taking care of approvals and optimisations so your mobile app makes a strong first impression.
7. Maintenance & support
After a successful launch, we can keep your mobile app updated, secure, and optimised for the latest OS and market trends through our app monitoring and support services. Whether it’s performance improvements, feature updates, or new third-party integrations, we ensure your app continues to evolve and deliver long-term value to users.
Technologies we use for app development
Your return on investment is at the heart of our mobile app development services and we are technology agnostic. This means we only use the technologies that will help you build the highest-performing, most scalable, and secure mobile application possible for your budget. Whether you need a native iOS app, an Android app or a cross-platform solution, we select the right tools for your project’s needs:
Native app development
- iOS app development
- Android app development
Cross-platform development
Take advantage of a single codebase for both iOS and Android without compromising quality, we typically use:
- Flutter
- React Native
- .NET MAUI
Backend development
As well as the mobile app front end, we have extensive expertise in building robust, high-performance backend systems that drive business success.
- .NET
Third-party integrations
Third party integrations are part of almost every project we do. These range from esoteric, custom built systems well know SaaS offerings:
- Payment gateways & PoS systems – Stripe, PayPal, Apple Pay, Google Pay
- CRM’s
- Mapping & geolocation
- ERP’s – Salesforce, Orcale, Dynamics
- Warehouse management systems
- Authentication – OAuth, Firebase Authentication, Okta
“The attention to detail, clarity, quality and pace which Steer73 deliver customer features is outstanding, which creates a working relationship more akin to a joint venture than a supplier / customer standard.”
Paddy Power
Retail companion app
Brody Sweeney, CEO (Camile)
Restaurant ordering app
What our clients have to say
How much does mobile app development cost?
One of the first questions businesses ask is, “How much will it cost to develop a mobile app?” The truth is, there’s no one-size-fits-all answer. What we’ve learned from years of building bespoke mobile apps is—every project is unique, and costs vary based on several factors.
What affects the cost?
The cost of mobile app development depends on:
- App complexity – The more features and integrations, the longer the development time.
- Platform compatibility – Do you need an iOS app, Android app, or both?
- Design & user experience – Custom or complicated UI/UX design increases development effort.
- Backend & integrations – Does your app need a custom backend or third-party integrations?
- Security & compliance – More robust security, encryption, and regulatory compliance requirements add cost.
- Business criticality – Business critical apps require more rigorous testing ,fail-safe infrastructure, and enterprise-grade security and therefore cost more than a simpler app.
Our engagement models
We offer three main engagement models to suit different project needs. Each model offers its own advantages, and we help you choose the best fit based on your requirements, budget, and timeline.
Fixed price model
- Waterfall
- Fixed price, fixed scope
Time & materials project
- Agile
- Fixed budget, adjustable scope
Managed service model
- Agile
- Fixed budget, adjustable scope
Which model is right for you?
Not sure which model is best? We’ll guide you through the decision and help you estimate your project cost. Here’s how we do it:
- Initial consultation – A short call where we discuss your idea and provide rough cost guidance based on similar projects we’ve done.
- Free discovery project – If you need a detailed estimate, we conduct a short discovery project to map out high-level functionality, technical needs, and budget considerations.
- Final decision – With the output from the discovery project, we align with you to balance cost, features, and technology choices so you can maximise your return on investment.
Whatever budget you’re working with, we’ll help you find the best approach to bring your mobile app to life efficiently and cost-effectively.
Want an estimate for your mobile app? Get in touch, and let’s discuss your project
Our mobile app development articles
Where do great products come from?
Discover how successful digital products emerge at the intersection of business needs, user expectations, and technological capabilities. Our proven methodology that has delivered consistent success across complex projects for over 8 years.
By Peter Honnor, Product Director @ Steer73
FAQS app development agency London
As your mobile app development agency, we take the confidentiality of your app seriously. Our team are bound by strict NDAs and confidentiality agreements. Project data access is also restricted on a need-to-know basis and is granted with role-based permissions.
The timeline for building a mobile or web app depends on the scope and complexity of your project. If you’re looking for a Minimum Viable Product with core features to get to market quickly, our London app development team can potentially deliver in just 2-3 months for simpler apps. But if you need a more robust, feature-packed app, you’re probably looking at several months of development time.
The cost of building a mobile app depends entirely on its proposed features and development requirements. An accurate estimate requires a thorough consultation with app development experts like us to understand your goals, after which a detailed proposal outlining the scope of work and associated costs will be provided.
We do. We split payments into key milestones to breakdown the cost of your app development and constrain risk. For more information send us an email at hello@steer73.com.
Android and iOS are the typical platforms we build for. We’ll also ensure your mobile app is submitted to the relevant app stores and app directories to reach a wider audience of mobile app users. However, if you need a more tailored solution, our team has the skills and experience to make it happen.
Depending on your project’s needs, goals and budget, we’re equipped to build native, hybrid, or cross-platform apps. We will work closely with you to determine the best approach that aligns with your goals, budget, and timeline.
Native apps are built specifically for either Android or IOS using their respective programming languages. This makes them fast, secure, and able to leverage all the device’s capabilities, however, separate codebases are needed for each platform, increasing cost. Cross-platform apps, on the other hand, are built using cross-platform technologies like React Native, .NET MAUI or Flutter, and a single codebase is used for multiple operating systems. While traditionally they may not have been as fast as native apps, cross-platform apps are more cost-effective due to requirement to maintain only one codebase. Additionally, with modern developments in cross-platform technologies, the differences between native and cross-platform performance are, in many use cases, zero. We wrote an article on this here.
The App development process typically starts with a consultation to discuss your goals for the mobile app. Once this has been done, we can give experience-based guidance. If you would like to discuss further, we typically run a free Discovery project where we assess your mobile app project at the Epic level. We usually present this, either in person in London, at your offices, or over Microsoft Teams. Finally, if you would like to proceed, we get stuck into your app project using the delivery methodology, payment model and technologies that best fit your requirements.
This depends on the delivery methodology you choose. Regardless of which option is chosen, we always aim to minimise the cost and time-impact of changes via transparency, clear documentation and robust prioritisation processes.
We help you build custom mobile apps without the expense, extended timelines or risk of failure usually associated with a custom solution. We guarantee the success of your project and our Digital Transformation Platform helps you leverage a set of resources proven to bring mobile apps to market faster, more cost effectively and more successfully than traditional agencies or off-the-shelf solutions.
Whether you’re looking for an app development agency in London or a remote team, we have the track record, the expertise and the toolkit to make your mobile app a success, guaranteed.
The frequency of mobile app updates depends on factors like your product roadmap, user feedback, industry trends, and platform requirements. We recommend releasing new updates periodically to address bugs, introduce new features, enhance security, and improve overall app performance. This will keep your mobile app competitive and relevant to your users. We will assess this for you in a free Discovery project.
Absolutely. As your app development agency, our commitment to your project extends beyond its launch date. Aside from partnering with you on new feature rollouts and updates, we also provide app monitoring and maintenance services to ensure your mobile app outperforms your competitors.
It’s never a bad time to talk with us!
No matter what stage your project is in, we would love to speak.
We offer a free discovery service to help you develop a deeper understanding of your problem, the potential software solutions and the costs involved in building these solutions.