Awakened Mind
A mindfulness and wellbeing platform with guided learning, meditation, and neuroscience-based sessions, delivered across mobile and web with synced user progress.
Mobile App Development
Custom Mobile App Development for Startups and Enterprises
Build reliable iOS, Android, and cross-platform apps that support your business goals. From product strategy and UI/UX design to development, testing, and launch, Differenz System helps startups, growing businesses, and enterprises turn their app ideas into products their customers can use.
Since 2013Building software products
300+ projectsMobile and web projects delivered
150+ clientsStartups to enterprises
ISO 27001Information security certified
Native and cross-platform, built in-house
Swift & SwiftUI
Kotlin
Flutter
React Native
Our mobile app developers build custom solutions around your users, business processes, and long-term goals. Whether you are launching a new product or improving an existing app, we help you choose the right platform, features, and technology for your needs.
OUR PORTFOLIO
Mobile Apps Built for Real Business Needs.
Explore mobile applications built for startups, growing businesses, and enterprises across healthcare, fintech, logistics, retail, education, and other industries. Each project reflects our approach to product strategy, design, development, testing, and long-term support.
Hubfleet
A fleet management solution covering vehicle operations, tracking, maintenance schedules, and driver workflows, built for daily use by operations teams and drivers in the field.
CaMI
A commissioning, qualification, and validation platform that helps engineering teams manage projects, assets, documentation, and compliance workflows from site and office.
Grow Curriculum
A digital education platform for managing curriculum, attendance, groups, and learning content, used by organizations running programs across multiple locations.
LookMa
A social support network for athletes, entertainers, scholars, and communities to share achievements, activities, and opportunities, with feeds, profiles, and media handling.
Grow Games & Icebreakers
A library of 500+ games and icebreakers with search, filtering, and saved lists, built to help group leaders find the right activity in a few taps.
HAVE A PROJECT IN MIND?
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Let's build something great together.
App types
Mobile apps we build
If your project looks like one of these, we've built something close to it before.
Customer-facing business apps
Accounts, self-service, notifications, and support for the customers you already serve.
eCommerce and shopping apps
Product browsing, carts, checkout, payments, order history, and post-purchase support.
Healthcare and wellness apps
Patient access, scheduling, care content, and secure handling of sensitive health data.
Fintech and digital payment apps
Account views, transactions, payment flows, and dashboards built on secure APIs.
Logistics and delivery apps
Dispatch, driver apps, route and status tracking, proof of delivery, and operations views.
Booking and marketplace apps
Two-sided platforms connecting users and providers with scheduling, payments, and messaging.
Education and eLearning apps
Courses, progress tracking, assessments, and content delivery for learners and instructors.
Internal business and field-service apps
Tools for staff and field teams, including forms, inspections, offline use, and reporting.
AI-powered mobile apps
Intelligent search, recommendations, document processing, and image or voice features.
IoT and wearable-connected apps
Apps that pair with devices and sensors to show live data and trigger actions.
What we do
Mobile app development services
We build native iOS and Android apps, as well as cross-platform applications using Flutter and React Native. Our team supports the full development lifecycle, including product planning, UI/UX design, development, testing, deployment, and ongoing maintenance.
iOS App Development
Build iPhone and iPad apps with Swift and SwiftUI. Native iOS development suits products that need Apple platform features, consistent performance on Apple hardware, and an interface that follows Apple's guidelines. We handle architecture, development, device testing, and App Store release.
SwiftSwiftUIXcodeApp Store release
Android App Development
Build Android apps with Kotlin for a wide range of devices and OS versions. Native Android development is useful when your users are spread across many device types or your app needs deep platform access. We test across supported screen sizes and Android versions before release.
KotlinAndroid StudioDevice testingGoogle Play release
Cross-Platform App Development
Build apps for iOS and Android from a shared codebase using Flutter or React Native. Cross-platform development can reduce duplicated development work and make updates easier when your app does not require extensive platform-specific features.
FlutterReact NativeShared codebase
Custom Mobile App Development
Build an app around your own workflows, data, and business rules rather than a fixed template. This suits businesses whose processes don't fit off-the-shelf software, and apps that need to exchange data with a CRM, ERP, payment system, or internal database.
Custom workflowsBusiness logicAPI integration
MVP Development
Launch a focused version of your app with the core features needed to test your idea. Our MVP development services help you validate user needs, gather feedback, and plan the next stage of product development without building everything at once.
Scope definitionCore featuresUser feedback
Mobile App UI/UX Design
Design clear user flows, wireframes, and interfaces that make your app easy to use. We focus on navigation, accessibility, and the user experience across supported devices, and hand over designs your development team can build from.
User flowsWireframesPrototypesAccessibility
App Testing, Launch & Support
Your app is tested for functionality, performance, security, and compatibility across supported devices before release. We support App Store and Google Play submission, then handle monitoring, bug fixes, OS updates, and new features after launch.
Manual & automated QAStore submissionMonitoringMaintenance
Choosing an approach
Native vs. cross-platform app development
There is no single right answer. The better choice depends on the features your app needs, the devices your users carry, and how you plan to maintain the product.
| Native apps | Cross-platform apps |
|---|---|
| Built for a specific operating system | Shared code across iOS and Android |
| Best when deep platform integration is important | Useful when reaching both platforms from one codebase is a priority |
| Full access to platform-specific APIs | Can reduce duplicated development work |
| Separate development per platform | Shared development for most features |
We review your requirements, users, integrations, and roadmap before recommending one. Read more on our cross-platform app development page.
How a project runs
Our mobile app development process
Every mobile app project starts with a clear plan. We work with you through discovery, design, development, testing, and launch to keep the project organized and ensure the final product meets your requirements.
01
Discovery & Planning
We review your business goals, users, and technical needs, then agree on what the app has to do.
What you receive: project goals, user requirements, a feature list, and a development roadmap.
02
UI/UX Design
We map how people move through the app before any screens are built, then design the interface.
What you receive: user flows, wireframes, and approved app designs.
03
Development
We build your app using the technology stack selected during planning.
What you receive: working app builds and regular progress updates throughout development.
04
Testing
We test your app for functionality, performance, security, and compatibility across supported devices. Our team fixes issues before release and prepares the app for launch.
What you receive: tested builds, bug fixes, and release readiness checks.
05
Launch & Support
We prepare the release and stay with the product after it ships.
What you receive: App Store and Google Play submission support, monitoring, and maintenance.
Technology stack
Technologies we use
We choose the stack during planning, based on the product, users, integrations, performance needs, and how the app will be supported long term.
Mobile Development
- Swift
- SwiftUI
- Kotlin
- Flutter
- React Native
Backend & APIs
- Node.js
- .NET
- Python
- REST APIs
- GraphQL
Cloud & Infrastructure
- AWS
- Microsoft Azure
- Google Cloud
- Firebase
Databases
- PostgreSQL
- MySQL
- MongoDB
Testing & Delivery
- Appium
- XCTest
- JUnit
- CI/CD
- GitHub Actions
Why Differenz System
Why businesses choose Differenz System
Businesses choose Differenz System for custom mobile app development, clear project communication, and support from planning through launch. Our team works with you to understand your goals, choose the right technology, and build a mobile app that can grow with your business.
- ✓Experience since 2013. Founded in 2013 and headquartered in West Hills, California, we have delivered 300+ mobile and web projects for 150+ clients, from first release to long-running products.
- ✓Custom solutions. We design the app around your users, workflows, and data instead of fitting your business into a fixed template, and connect it to the systems you already run.
- ✓Transparent project communication. You work with a dedicated project manager, see working builds as they're ready, and know what is being built next and why.
- ✓Security-focused development. We build security into the development process through secure API design, access controls, data encryption, and testing. For regulated industries, we review applicable requirements and design the solution around the project's compliance needs. Our ISO 27001 certification covers how we handle information security internally.
- ✓Long-term maintenance and support. We stay with the product after launch for monitoring, OS updates, performance work, and new features, so the app keeps working as platforms change.
2013year founded
300+mobile and web projects delivered
150+clients served
ISO 27001information security certified
Your project team
Who works on your app
A typical mobile project is staffed with these roles. The mix changes with the size and stage of the product.
Product strategist
Turns your goals into a feature set, scope, and roadmap you can build against.
UI/UX designer
Builds the user flows, wireframes, and interface designs the app is built from.
Mobile app developer
Builds the iOS, Android, or cross-platform application itself.
Backend developer
Builds the APIs, data model, and integrations the app depends on.
QA engineer
Tests functionality, performance, security, and device compatibility before release.
Project manager
Runs the schedule, keeps you updated, and is your point of contact throughout.
Built for your industry
Industries we serve
Every industry has different workflows, customer expectations, and compliance requirements. We adapt each application to the users, data, integrations, and devices specific to yours.
Healthcare
Patient apps, care tools, scheduling, secure data access, and clinical workflows.
Fintech & Banking
Finance apps, payment flows, dashboards, account tools, and secure financial workflows.
Logistics & Transportation
Tracking, routing, delivery, fleet, driver, dispatch, and operations apps.
Retail & eCommerce
Shopping apps, product browsing, customer accounts, payments, orders, and support.
Education
Learning apps, student portals, teacher tools, course content, and communication features.
Real Estate
Property search, listings, agent tools, lead management, and buyer experiences.
Insurance
Customer portals, claims workflows, policy tools, document management, and secure data access.
Manufacturing
Production tracking, quality checks, inventory, maintenance, and shop-floor reporting.
Automotive
Connected vehicle apps, dealer tools, service workflows, and customer experiences.
Working in another sector? See all industries we build software for.
Business value
How mobile apps support business growth
A well-designed mobile app can help businesses reach customers, simplify workflows, and create new ways to deliver products and services. The right app depends on your users, business goals, and the problems you want to solve.
Improve customer access and engagement
Give customers a direct route to your service on the device they already carry.
Simplify business workflows
Replace manual steps and paperwork with processes that run inside the app.
Support new revenue opportunities
Mobile ordering, subscriptions, and payments open channels a website may not serve well.
Connect with business systems and data
Link the app to your CRM, ERP, payment systems, and databases through secure APIs.
Improve the user experience
Fewer steps, clearer navigation, and interfaces designed for the way people use phones.
Make services easier to access across devices
Keep the experience consistent whether people are on a phone, a tablet, or the web.
Client feedback
What our clients say
Feedback from organizations we've built and maintained mobile and web products for.
Differenz have provided London Sport excellent web development services across three products. We have been delighted with all areas of their work; expertise, technical knowledge and account management. We have asked Fazil and his team to take on the rebuild of an existing product, the ongoing development of another and build another from scratch – on all they have exceeded expectations.
Peter Meldrum
Digital Product ManagerThe team have worked in a few projects for me: some from scratch and some fixing the work of other developers. They’ve always been responsive, professional and done a great job. I continue to use them for all of my website and app development tasks.
Naomi D Fabio
Founder and CEO, Vera FlowDifferenz have been providing ongoing app and web development services to us for the last two years. They have great expertise and we have always found their work of the highest quality, even when handling extremely complex requirements. They also provide great customer service, with our account manager always on hand to talk through requirements and issues. Highly recommended!
Rupert Jenner
Founder & CEO, Playwaze Ltd
Common questions
Frequently asked questions
What is mobile app development?
Mobile app development is the process of planning, designing, building, testing, and maintaining applications for mobile devices such as smartphones and tablets. Apps can be built for iOS, Android, or both using native or cross-platform technologies.
How much does mobile app development cost?
Mobile app development costs depend on the app's features, design, platforms, integrations, security requirements, and development time. A simple MVP may cost less than a complex enterprise application. After understanding your requirements, we can help you plan the scope and estimate the development effort.
How long does mobile app development take?
A simple MVP may take around 6–12 weeks, while a medium or complex app can take several months. The timeline depends on the number of features, design complexity, platforms, integrations, security requirements, and testing. We provide a project timeline after reviewing your requirements.
Should I build a native or cross-platform app?
Native development is a strong choice when your app needs platform-specific features, advanced hardware access, or a highly customized user experience. Cross-platform development can reduce duplicated development work when your app does not require extensive platform-specific features. We review your product requirements, users, and roadmap before recommending an approach.
Do you develop both iOS and Android apps?
Yes. We build native iOS apps with Swift and SwiftUI, native Android apps with Kotlin, and cross-platform apps with Flutter or React Native that run on both platforms from a shared codebase.
Can you help publish the app to the App Store and Google Play?
Yes. We prepare the app for release and support the Apple App Store and Google Play submission process, including store assets, app information, technical checks, and release requirements. We do this for our own apps as well.
Do you provide maintenance and support after launch?
Yes. We provide post-launch monitoring, bug fixes, operating system updates, performance work, security updates, and new feature development based on your ongoing needs.
How do I get started?
Book a consultation and tell us about your app idea, business goals, and target users. We review the requirements, discuss the right approach and platforms, and outline the scope, timeline, and next steps for your project.