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App Design & Development

We design and develop mobile apps that users understand, businesses can scale and product teams can confidently take to market.

Build Apps Users
Keep Opening

Featured among top digital agency rankings
Recognized for innovation as an AI digital agency
Nominated 5+ times as UX, design and marketing agency
Served 50+ high-growth startups and established enterprises
Featured among top digital agency rankings

[Our Services]

Every Decision Designed to Build a Better App

From product discovery and UX design to engineering, testing and launch, we handle every stage needed to turn an app idea into a reliable digital product.

As a trusted mobile app development company, we design and build scalable iOS, Android, and cross-platform applications that combine intuitive experiences with reliable performance.

Every Decision Designed to Build a Better App

From product discovery and UX design to engineering, testing and launch, we handle every stage needed to turn an app idea into a reliable digital product.

UI/UX DESIGN & PROTOTYPING

UI/UX Design & Prototyping

We design mobile experiences around real user behaviour, making journeys simpler and helping more users stay engaged.

FRAMEWORK

Every app experience begins with user research, strategic planning, and interactive prototyping that validates ideas before development by combining:

  • User experience strategy
  • User interface design
  • Wireframing & user flows
  • Interactive prototyping
  • Design systems
  • Usability testing
80+
App UI/UX
Projects
300+
User Journeys
Designed
Book a Free Strategy Call

NATIVE APP DEVELOPMENT (iOS & Android)

Native App Development (iOS & Android)

We build high-performance native mobile applications that deliver seamless experiences, faster performance, and platform-specific functionality across iOS and Android devices.

FRAMEWORK

Every native application is engineered for speed, security, and scalability by integrating platform-specific technologies through:

  • iOS app development
  • Android app development
  • Native architecture
  • Secure API integration
  • Performance optimisation
  • Device compatibility testing
50+
Native Apps
Delivered
98%
Launch
Success
Book a Free Strategy Call

CROSS-PLATFORM APP DEVELOPMENT

Cross-Platform App Development

We develop scalable cross-platform applications that reduce development time, maximise reach, and deliver consistent experiences across multiple operating systems.

FRAMEWORK

Every cross-platform application is developed for efficiency and consistency by leveraging modern frameworks and reusable architecture through:

  • Flutter development
  • React Native development
  • Shared codebase architecture
  • Cross-device optimisation
  • Native feature integration
  • Performance testing
40+
Cross-Platform
Apps
50%
Faster
Deployment
Book a Free Strategy Call

MVP & PRODUCT VALIDATION

MVP & Product Validation

We transform product ideas into market-ready MVPs that validate concepts quickly, reduce development risk, and accelerate investment and customer feedback.

FRAMEWORK

Every MVP is designed to validate ideas quickly while minimising development costs by prioritising essential product functionality through:

  • Product discovery
  • Feature prioritisation
  • Rapid prototyping
  • Agile development
  • User validation
  • Iterative improvements
50+
MVPs
Launched
£2M+
Funding
Supported
Book a Free Strategy Call

APP TESTING & QUALITY ASSURANCE

App Testing & Quality Assurance

We test every application across devices and user scenarios, ensuring reliable performance, security, and seamless experiences before every product launch.

FRAMEWORK

Every application undergoes rigorous quality assurance to minimise risks and maximise reliability by performing comprehensive testing through:

  • Functional testing
  • Performance testing
  • Security testing
  • Device compatibility
  • Bug identification
  • Quality assurance reporting
1,000+
Testing
Scenarios
98%
Quality
Delivery
Book a Free Strategy Call

POST-LAUNCH SUPPORT & MAINTENANCE

Post-Launch Support & Maintenance

We continuously improve your application with proactive updates, monitoring, and technical support that keeps your product secure, stable, and future-ready.

FRAMEWORK

Every application continues evolving after launch by delivering proactive maintenance, performance improvements, and long-term technical support through:

  • Performance monitoring
  • Security updates
  • Feature enhancements
  • Bug resolution
  • Version upgrades
  • Technical support
24/7
App
Monitoring
98%
Support
Delivery
Book a Free Strategy Call

APP STORE OPTIMISATION (ASO)

App Store Optimisation (ASO)

We improve your app's visibility across the App Store and Google Play, increasing downloads, discoverability, and long-term organic growth.

FRAMEWORK

Every optimisation strategy improves app discoverability and conversion by combining keyword research, creative optimisation, and continuous performance analysis through:

  • App Store keyword optimisation
  • Google Play optimisation
  • Listing copy optimisation
  • Screenshot optimisation
  • Ratings & review strategy
  • Performance monitoring
40+
ASO
Strategies
2X
Organic App
Visibility
Book a Free Strategy Call

UI/UX DESIGN &
PROTOTYPING

End-to-End Product Design Mobile Architecture
Scalable Infrastructure User-Centric Design Systems

NATIVE APP DEVELOPMENT
(iOS & Android)

Native Swift Engineering Apple Ecosystem Integration
App Store Optimisation iOS Performance Tuning

CROSS-PLATFORM APP
DEVELOPMENT

Native Kotlin Engineering Multi-Device Compatibility
Google Play Deployment Android Performance Optimisation

MVP & PRODUCT
VALIDATION

Single-Codebase Engineering Flutter & React Native
Cost-Effective Scaling Unified UI Alignment

APP TESTING &
QUALITY ASSURANCE

Legacy Code Refactoring Modern UX Modernisation
Performance Speed Audits Feature Expansion Planning

POST-LAUNCH SUPPORT
& MAINTENANCE

Legacy Code Refactoring Modern UX Modernisation
Performance Speed Audits Feature Expansion Planning

APP STORE
OPTIMISATION (ASO)

Legacy Code Refactoring Modern UX Modernisation
Performance Speed Audits Feature Expansion Planning
We design mobile experiences around real user behaviour, making journeys simpler and helping more users stay engaged.

FRAMEWORK: Every app experience begins with user research, strategic planning, and interactive prototyping that validates ideas before development by combining:

User experience strategy User interface design Wireframing & user flows Interactive prototyping Design systems Usability testing
80+
App UI/UX
Projects
300+
User Journeys
Designed
We build high-performance native mobile applications that deliver seamless experiences, faster performance, and platform-specific functionality across iOS and Android devices.

FRAMEWORK: Every native application is engineered for speed, security, and scalability by integrating platform-specific technologies through:

iOS app development Android app development Native architecture Secure API integration Performance optimisation Device compatibility testing
50+
Native Apps
Delivered
98%
Launch
Success
We develop scalable cross-platform applications that reduce development time, maximise reach, and deliver consistent experiences across multiple operating systems.

FRAMEWORK: Every cross-platform application is developed for efficiency and consistency by leveraging modern frameworks and reusable architecture through:

Flutter development React Native development Shared codebase architecture Cross-device optimisation Native feature integration Performance testing
40+
Cross-Platform
Apps
50%
Faster
Deployment
We transform product ideas into market-ready MVPs that validate concepts quickly, reduce development risk, and accelerate investment and customer feedback.

FRAMEWORK: Every MVP is designed to validate ideas quickly while minimising development costs by prioritising essential product functionality through:

Product discovery Feature prioritisation Rapid prototyping Agile development User validation Iterative improvements
50+
MVPs
Launched
£2M+
Funding
Supported
We test every application across devices and user scenarios, ensuring reliable performance, security, and seamless experiences before every product launch.

FRAMEWORK: Every application undergoes rigorous quality assurance to minimise risks and maximise reliability by performing comprehensive testing through:

Functional testing Performance testing Security testing Device compatibility Bug identification Quality assurance reporting
1,000+
Testing
Scenarios
98%
Quality
Delivery
We continuously improve your application with proactive updates, monitoring, and technical support that keeps your product secure, stable, and future-ready.

FRAMEWORK: Every application continues evolving after launch by delivering proactive maintenance, performance improvements, and long-term technical support through:

Performance monitoring Security updates Feature enhancements Bug resolution Version upgrades Technical support
24/7
App
Monitoring
98%
Support
Delivery
We improve your app's visibility across the App Store and Google Play, increasing downloads, discoverability, and long-term organic growth.

FRAMEWORK: Every optimisation strategy improves app discoverability and conversion by combining keyword research, creative optimisation, and continuous performance analysis through:

App Store keyword optimisation Google Play optimisation Listing copy optimisation Screenshot optimisation Ratings & review strategy Performance monitoring
40+
ASO
Strategies
2X
Organic App
Visibility

Started From Wireframe to Launch

[Our Work]

Every app begins with a clear business goal and ends with performance. As a custom mobile app development agency, we create digital experiences that expand global brands.

Every app begins with a clear business goal and ends with performance. As a custom mobile app development agency, we create digital experiences that expand global brands.

Plutos Payments

iOS & Android Mobile UI/UX

Creator Connect

Hybrid Apps Flutter Tech

Elite Coterie

App Backend API Systems
Book a Free Strategy Call
01 Adsmood 02 CC Lab 03 Spark Epos 04 HiveTax 05 SenseSmart 06 Klensa App
Featured among top digital agency
Recognised for innovation as an AI digital agency
Nominated 5+ times as UX, design and marketing agency
Served 50+ high-growth startups and established enterprises
Featured among top digital agency

[Let’s Talk]

contact@proxdigitalagency.com +1 239 427 4097

We let our track record do the talking. Discover how Prox Digital Agency drives transformative growth for global brands.

Discuss Your Project Freely

Victoria Horsley

Victoria Horsley

Business Development Manager
Schedule a call

Solve the Build Problems
Holding Your App Back

[Challenges]

A polished design means nothing if users don't understand it. Poor UX leads to confusion, drop-offs, and low daily engagement.

Schedule a call

Unclear scope and poor planning delay launches for months. Businesses lose market timing and momentum waiting for apps to ship.

Schedule a call

Confusing navigation and slow interactions frustrate users fast. Most people abandon an app within days if it feels difficult to use.

Schedule a call

Picking the wrong development approach wastes budget and time. Businesses need the right platform strategy matched to their actual goals.

Schedule a call

Skipping proper testing leads to crashes, bugs, and poor reviews. Unstable apps lose user trust and damage ratings within days.

Schedule a call

Apps built without scalability in mind slow down or break under real user demand. Growth exposes weak technical foundations fast.

Schedule a call
Challenges

Solve the Build Problems Holding Your App Back

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Poor App UX

A polished design means nothing if users don't understand it. Poor UX leads to confusion, drop-offs, and low daily engagement.

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Delayed Launches

Unclear scope and poor planning delay launches for months. Businesses lose market timing and momentum waiting for apps to ship.

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Low User Retention

Confusing navigation and slow interactions frustrate users fast. Most people abandon an app within days if it feels difficult to use.

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Wrong Tech Choice

Picking the wrong development approach wastes budget and time. Businesses need the right platform strategy matched to their actual goals.

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Buggy Releases

Skipping proper testing leads to crashes, bugs, and poor reviews. Unstable apps lose user trust and damage ratings within days.

tabs_images

Poor System Scaling

Apps built without scalability in mind slow down or break under real user demand. Growth exposes weak technical foundations fast.

Schedule a call

[Benefits]

The ‘Build Advantages’ Behind
Every Successful App

Faster Market Entry

Clear planning and efficient delivery reduce unnecessary delays, helping you reach the market sooner.

Book a Free Strategy Call

Higher User Retention

Intuitive design and reliable performance give users more reasons to return after their first download.

Book a Free Strategy Call

Scalable Growth Architecture

Strong technical foundations help your app handle more users, features and integrations as the product grows.

Book a Free Strategy Call

Ongoing Post-Launch Support

Continuous updates, bug fixes, and monitoring keep your app stable, secure, and performing well long after the initial launch.

Book a Free Strategy Call
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The Results

Every Launch Is Just
The Beginning

Hard evidence, raw performance, category-defining scale, undeniable authority, and the unapologetic impact of work that actually moves markets.

Book a Free Strategy Call Arrow Up Icon
Result Icon

30+

Apps Delivered

More than 30 brands transformed their digital presence through strategically designed, user-focused apps built to engage users and accelerate business growth.

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£2M+

Revenue Influenced

Our apps have supported over £2M in measurable business growth by improving user experiences, increasing engagement, and strengthening product performance.

Result Icon

67%

Client Retention

Exceptional apps create lasting partnerships. Businesses continue to choose Prox for ongoing optimisation, support, and product growth.

Result Icon

40%

User Retention Improvement

Strategic UX, intuitive navigation and engagement-focused design help brands turn more downloads into active users.

Every Launch Is Just
The Beginning

Hard evidence, raw performance, category-defining scale, undeniable authority, and the unapologetic impact of work that actually moves markets.

Result Icon

30+

Apps Delivered

More than 30 brands transformed their digital presence through strategically designed, user-focused apps built to engage users and accelerate business growth.

Result Icon

£2M+

Revenue Influenced

Our apps have supported over £2M in measurable business growth by improving user experiences, increasing engagement, and strengthening product performance.

Result Icon

67%

Client Retention

Exceptional apps create lasting partnerships. Businesses continue to choose Prox for ongoing optimisation, support, and product growth.

Result Icon

40%

User Retention Improvement

Strategic UX, intuitive navigation and engagement-focused design help brands turn more downloads into active users.

Book a Free Strategy Call Arrow Up Icon

[Reviews]

The Proof Is in Every App
Users Keep Open

The Proof Is in Every App Users Keep Open

Creator Connect Logo

I have engaged several agencies in India; they were proficient with templates and development, yet lacked the innovative ideas we sought upon discovering Prox Digital Agency, their vibrant and imaginative work convinced me that they are the ideal partner for our vision

VIBHAV TANEJA

Vibhav Taneja

Founder - Smart Sense
TrustPilot
Pure Estate Logo

Prox Design has delivered exceptional results, profoundly transforming both our brand identity and lead‑generation pipeline. The entire team demonstrated professionalism, responsiveness, and a genuine commitment to our success.

Pure Estate Owner

Adnan Ghouri

Founder - Pure Estate
TrustPilot
Creator Connect Logo

During the initial call with Prox, I felt an immediate confidence that eliminated the need to consider any other agency. Their professionalism and innovative redesign of our website delivered exceptional results. I look forward to partnering with them for our digital marketing initiatives

Woody Mabbott

Woody Mabbott

Founder - CreatorConnect
TrustPilot
Pure Estate Logo

Prox Design spearheads our marketing strategy, significantly enhancing our brand presence. Their efforts have generated higher‑quality leads and deeper audience engagement. I give them my highest recommendation

LEO PERESTRELO

Leo Perestrelo

Marketing Manager - Veracity
TrustPilot

Discuss Your Project Freely

Victoria Horsley

Victoria Horsley

Business Development Manager

The Next App They
Love Starts Here

[Let’s Start together]

Every screen, interaction, and feature is designed to create memorable experiences, increase engagement, and transform your idea into a product people keep using.

Tech That Moves
Products Forward

Most agencies write code. We build platforms. Every product feature serves user retention because software that does not solve real problems is just bloatware.

[Tech Stack]

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[SECTORS]

Designed For The Way
Your Industry Competes

FinTech Apps

We design fintech apps that make complex financial tools feel simple by keeping user data secure while making everyday transactions fast and trustworthy.

Healthcare Apps

Our healthcare apps help patients book, connect, and manage care easily, all while staying fully compliant and simple enough for every user.

eCommerce Apps

We build eCommerce apps that make browsing and buying effortless by turning quick taps into completed purchases and repeat customers.

Real Estate Apps

Our real estate apps make finding, comparing, and enquiring about properties simple by giving buyers and tenants a smooth, mobile-first experience.

Startup Apps

We build lean, scalable apps that help startups test ideas fast, win early users, and grow without rebuilding from scratch later.

FinTech Apps

We design fintech apps that make complex financial tools feel simple by keeping user data secure while making everyday transactions fast and trustworthy.

industry Image

FinTech Apps

Healthcare Apps

Our healthcare apps help patients book, connect, and manage care easily, all while staying fully compliant and simple enough for every user.

industry Image

Healthcare Apps

eCommerce Apps

We build eCommerce apps that make browsing and buying effortless by turning quick taps into completed purchases and repeat customers.

industry Image

eCommerce Apps

Real Estate Apps

Our real estate apps make finding, comparing, and enquiring about properties simple by giving buyers and tenants a smooth, mobile-first experience.

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Real Estate Apps

Startup Apps

We build lean, scalable apps that help startups test ideas fast, win early users, and grow without rebuilding from scratch later.

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Startup Apps

[Awards & Recognition]

Top GEO SEO Global Agencies 2026

2026 Rankings

Top-Rated Digital Agency, 2026

2026 Rankings

Site of the Day Winner, Global Design Gallery, 2026

2026 Rankings

[Real Results]

Proof Beats Promises
Every Single Time

Join The Growth Journey Of 500+ Brands

Vibhav Taneja

Founder SmartSense

Adnan Ghouri

CEO and Founder of Pure Estate

Woody Mabbott

Founder- CreatorConnect

Leo Perestrlo

Marketing Manager

[Talk to an expert]

[Talk to an expert]

[Talk to an expert]

[Talk to an expert]

[Talk to an expert]

[Services Map]

                     
Explore All

Insights Over Vague Headlines

[Insights]

Strategy, Growth & Digital Reality

Blog Image
Stop Watch John Doe Stop watch Icon 2 mins

This Week, Prox Transformed KAVERO’s Digital Experience

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Stop Watch John Doe Stop watch Icon 2 mins

SEO vs GEO in 2026: The Complete Guide

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Stop Watch John Doe Stop watch Icon 2 mins

Prox Enters Its Next Era With a Complete Evolution For The AI Age

Frequently
Asked Questions

We’ve heard it all. Here’s everything you need to know before working with us.

users image

Still have questions for your next project?

Schedule a call

App design covers the look, feel, and user experience, while app development builds the functionality behind it. Prox Digital Agency handles both together as part of our full mobile app development services, so nothing gets lost between the two.

It depends on your budget, timeline, and features. Native suits performance-heavy apps; cross-platform suits faster, cost-effective builds. As a mobile app development company, Prox Digital Agency helps you choose based on your actual goals.

Cost depends on complexity, platform choice, and features required. Prox Digital Agency, a custom mobile app development company, scopes every project individually and provides a clear, upfront quote before work begins.

Most apps take 3 to 9 months depending on complexity. Prox Digital Agency provides a realistic timeline upfront based on your specific project scope for mobile app development.

Yes. We build for iOS, Android, or both, using native or cross-platform development depending on what best suits your app and budget as part of our app development agency services.

An MVP is a simple first version that tests your core idea with real users. Prox Digital Agency often recommends this to reduce risk before scaling further with mobile app development.

Yes. Every app goes through rigorous testing for bugs, performance, and stability before launch by ensuring a smooth experience from day one across all our mobile app development company projects.

Yes. Prox Digital Agency provides ongoing updates, monitoring, and fixes after launch to keep your app stable, secure, and performing well as part of our mobile app development company in UK offering.

Yes. We manage the full submission process, handling platform requirements and guidelines so your app gets approved smoothly and on time through our app development agency London team.

Yes. Alongside mobile apps, Prox Digital Agency builds web apps for businesses needing browser-based functionality alongside or instead of a mobile app, all part of our mobile app development UK services.

No. We work with startups and small businesses regularly, often starting with a lean MVP to validate the idea before scaling further through our mobile app development company UK.

Yes. Prox Digital Agency is based in London and offers full app design and development services, including mobile app development London to businesses across the city.

Yes. Alongside our London base, Prox Digital Agency works with businesses across the UK, delivering app development company UK and mobile app development company UK services nationwide.

We build using the technology best suited to your project, including Swift, Kotlin, Flutter, and React Native, chosen based on your specific goals for mobile app development in London.

Prox Digital Agency combines strong design, reliable engineering, and ongoing support, backed by a decade of experience as a leading mobile app development company London and app development company London businesses trust.

More Faqs
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Still have questions for your next project?

Schedule a call
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London rewards brands that think differently. As a digital marketing agency London businesses trust, Prox assists startups, scale-ups, and established companies to earn attention, build demand and grow through strategy, creativity or AI-powered marketing.

Orlando is home to leading businesses serving local, national and global audiences. Prox builds digital marketing systems that strengthen brand presence, attract qualified customers, and create sustainable growth through creativity, technology and fast performance.

Melbourne celebrates brands that dare to stand apart. Prox assists top leading businesses build stronger market presence, attract the right customers, and create lasting growth through strategy, creativity, technology, and AI-powered marketing.

Dubai moves fast and global brands need marketing that keeps pace. Prox partners with businesses across the region to create digital campaigns, memorable customer experiences and performance strategies that transform visibility into restless commercial growth.

Address

mapmarker
114 Goodmayes Rd, Ilford London
IG3 9UZ, United Kingdom
7345 W Sand Lake Road, Ste 210,
Office 2890, Orlando, Fl 32819
50 St Georges Terrace Suite
#1051 Perth, WA 6000
Queen Elizabeth 2, DUQE Square
Business Center, Port Rashid, Dubai

United Kingdom

United States

Australia

UAE

[Let’s Talk]

If you’re looking for a global growth agency that understands growth, execution, and accountability, you’re in the right place.

Discuss Your Project Freely

Victoria Horsley

Victoria Horsley

Business Development Manager
Schedule a call

How can we help you?