Flutter, React Native and .NET MAUI apps that reach both platforms at once, with 70% to 90% of the codebase shared and a near-native experience on every device.
Trusted By
750+ happy clients, including top Fortune 500 companies
Overview
Cross-platform app development is the practice of building mobile applications that run on multiple operating systems, iOS and Android, from a single, unified codebase.
Using frameworks like Flutter, React Native and .NET MAUI, developers write code once and deploy it across all target platforms. This approach significantly reduces development time and cost compared to building separate native apps for each platform, while still delivering a near-native user experience.
Key Advantages
A single codebase means your engineering team is not split across two parallel work streams. Features ship simultaneously to iOS and Android. For startups competing in crowded markets, this speed advantage is decisive.
Maintain one team instead of two. Reuse 70% to 90% of your codebase across platforms. Studies show cross-platform development can reduce mobile app development costs by 30% to 40% compared to building separate native applications.
One repository. One deployment pipeline. One security audit. Every line of business logic, every API integration and every data model exists in a single place, making your codebase dramatically easier to govern.
Bug fixes, security patches and feature updates are applied once and deployed everywhere. Your team spends less time on maintenance overhead and more time building product value.
iOS and Android together command over 99% of the global smartphone market. Cross-platform mobile application development ensures your app is available to all of them from day one, without the cost of sequential platform launches.
Frameworks like Flutter render UI using their own graphics engine, meaning your app looks and behaves identically across every device, every screen size and every operating system.
New features enter the market on both platforms simultaneously. No waiting for the iOS team to catch up with Android. No version fragmentation. No inconsistent user experiences across platforms.
Every dollar spent on development compounds across both platforms. Every component built is reusable. Every performance optimisation benefits all users. Cross-platform development improves the return on your engineering investment.
What We Build
Sphinx Solutions offers a complete portfolio of cross-platform app development solutions, from initial product strategy to long-term post-launch support.
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As a leading Flutter app development company, we build high-performance mobile applications from a single codebase using Google’s Flutter framework. Our team creates visually rich, scalable apps that deliver a native-like experience across iOS and Android while reducing development time and maintenance costs.
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Our React Native app development services help businesses launch cross-platform applications faster using a shared JavaScript codebase. By combining React Native’s flexibility with native integrations, we deliver responsive mobile experiences that support rapid product growth and long-term scalability.
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For organisations operating within the Microsoft ecosystem, we develop enterprise-grade applications using .NET MAUI. Our solutions integrate seamlessly with existing Microsoft technologies, enabling businesses to modernise mobile experiences while leveraging their current infrastructure investments.
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Exceptional mobile experiences begin with thoughtful design. We create adaptive UI/UX systems that ensure consistency across platforms while respecting platform-specific user behaviours, resulting in intuitive applications that improve engagement and user satisfaction.
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Launching quickly can be the difference between leading a market and missing an opportunity. Our MVP development services help businesses validate ideas with a streamlined, market-ready product that accelerates feedback collection, investor interest and product-market fit.
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Maintaining separate iOS and Android codebases can significantly increase costs and complexity. We help businesses migrate existing native applications to modern cross-platform frameworks, creating a unified codebase that simplifies maintenance and future development.
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Outdated applications can limit growth, reduce user engagement and create security risks. Our app modernisation services transform legacy mobile products with updated architectures, modern interfaces and scalable technologies that align with current business needs.
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We build intelligent mobile applications that leverage AI technologies such as generative AI, machine learning, natural language processing and predictive analytics. These capabilities enable businesses to deliver personalised, data-driven user experiences that create a competitive advantage.
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Quality is built into every stage of our development process. Our comprehensive QA and testing services ensure cross-platform applications perform reliably across devices, operating systems and user scenarios while maintaining security, accessibility and performance standards.
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Successful mobile products require continuous optimisation after launch. Our maintenance and support services help businesses keep applications secure, compatible and high-performing through ongoing monitoring, updates, enhancements and dedicated technical support.
Talk to our service expertsWhat We Solve
Modern businesses need mobile applications that reach users across multiple platforms without increasing development complexity. Whether you’re building a new digital product, modernising an existing application, or integrating advanced technologies like AI, our solutions are designed to accelerate time-to-market while optimising development costs.
We develop secure, scalable enterprise applications that streamline business operations, improve workforce productivity and integrate seamlessly with existing business systems. Our solutions enable companies to deliver consistent experiences across devices while maintaining enterprise-grade security and compliance standards.
From retail and e-commerce to healthcare and fintech, we build customer-centric mobile applications designed to increase engagement, improve user retention and strengthen brand loyalty. Our solutions focus on delivering intuitive experiences that perform seamlessly across iOS and Android devices.
For startups and innovators, speed is critical. We develop minimum viable products (MVPs) that help validate ideas, attract early adopters and gather real-world feedback without the expense of building separate native applications. This approach allows businesses to test concepts quickly and scale with confidence.
We integrate advanced artificial intelligence capabilities into cross-platform applications, including conversational AI, recommendation engines, predictive analytics, computer vision and intelligent automation. These solutions help businesses deliver personalised experiences and unlock new growth opportunities.
Our cross-platform development solutions enable businesses to launch feature-rich eCommerce platforms and online marketplaces with secure payment integrations, inventory management, real-time notifications and seamless customer experiences across devices.
We build on-demand mobile applications for industries such as transportation, food delivery, healthcare, home services and logistics. These solutions include real-time tracking, scheduling, payment processing and customer communication features that support modern service delivery models.
We help organisations transform ideas into scalable software products with cross-platform applications that support subscription models, user management, analytics and cloud-based functionality. These solutions are designed to grow alongside your business and customer base.
Businesses with outdated mobile products can leverage our modernisation services to upgrade application architecture, improve performance, enhance security and migrate to modern cross-platform frameworks without disrupting existing operations.
Our team develops cross-platform applications that connect with IoT devices, wearables, sensors and smart systems. These solutions enable real-time monitoring, data visualisation, automation and remote device management for a wide range of industries.
Beyond development, we provide continuous support, monitoring, performance optimisation, feature enhancements and platform updates to ensure your application remains secure, reliable and competitive as technologies evolve.
Integrations
We help organisations solve complex business challenges through innovative cross-platform development. Our team has extensive experience integrating advanced technologies, third-party services and enterprise systems to create feature-rich applications that drive growth and operational efficiency.
We integrate secure and reliable payment gateways that enable businesses to accept online payments across multiple platforms and regions. Our solutions support seamless transactions, subscription models, digital wallets and compliance with industry security standards.
Our BLE integration solutions connect mobile applications with smart devices, sensors and IoT ecosystems. This enables real-time data exchange, device monitoring and enhanced user experiences for healthcare, fitness, manufacturing and connected products.
We develop enterprise-ready applications with Mobile Device Management integration to improve security, device control and compliance. This helps organisations efficiently manage employee devices while protecting sensitive business information.
Our cross-platform expertise extends beyond smartphones to wearable devices such as smartwatches and fitness trackers. We create connected experiences that allow users to access real-time information, health data, notifications and business applications on the go.
We build real-time communication capabilities into mobile applications through secure chat server integration. Whether it’s customer support, team collaboration or social networking, our solutions enable instant messaging, file sharing and live engagement features.
Our beacon-enabled applications leverage location-based technology to deliver personalised notifications, proximity marketing, indoor navigation and enhanced customer engagement. These solutions are particularly effective for retail, hospitality, healthcare and event management businesses.
We integrate leading mBaaS platforms to accelerate mobile application development and scalability. By leveraging cloud-based backend services, businesses can reduce infrastructure complexity while improving performance, security and data management.
Our GPS and navigation solutions enable real-time location tracking, route optimisation, geofencing and map-based services. These capabilities help businesses improve logistics operations, field service management, ride-sharing experiences and location-aware customer interactions.
What We Use
Choosing the right framework is one of the most consequential decisions in your mobile product journey. Our framework recommendation is always based on your product requirements, team skills, timeline and long-term maintainability, not the framework of the moment. Here is how the leading frameworks compare.
Comparison
Flutter is generally better for apps requiring high visual fidelity, smooth animations and consistent cross-device UI. React Native is stronger for teams with existing JavaScript expertise or projects that need rapid iteration with a mature ecosystem. Both are production-ready. The best choice depends on your use case, team and performance requirements.
| Criterion | Flutter | React Native |
|---|---|---|
| Performance | Near-native; custom Skia/Impeller rendering engine. | Near-native; bridges to native components. |
| UI experience | Pixel-perfect consistency across all devices and platforms. | Platform-native UI components, so they look more native per OS. |
| Developer community | Rapidly growing; backed by Google. | Mature, backed by Meta, with a large JavaScript ecosystem. |
| Scalability | Excellent; modular architecture and strong state management options. | Good; it can require more architectural discipline at scale. |
| Development speed | Fast; hot reload and a rich widget library. | Very fast; leverages existing JS/React knowledge. |
| Enterprise readiness | Strong; adopted by global enterprises, including BMW and major Google-backed products. | Strong; used across Meta’s ecosystem and by companies such as Shopify. |
| Maintenance | Single codebase; easy to maintain. | Single codebase; can require native module attention. |
| Learning curve | Moderate (Dart); fast for experienced teams. | Low for JS developers; React knowledge transfers directly. |
Choose Flutter if your product demands rich, custom UI, high-performance animations, or consistent brand expression across every screen.
Choose React Native if your team is JavaScript-native, your timeline is aggressive, or your product requires deep integration with existing React web components.
How We Build It
Our cross-platform app development practice is supported by a comprehensive, modern technology stack.
How We Work
Building a great app is not just a technical problem; it is a strategic, design and engineering challenge. Here is how Sphinx Solutions delivers cross-platform mobile applications that succeed in the market.
Step 1
What we do: We conduct detailed stakeholder discussions, analyse business objectives, identify user needs, assess technical requirements and define the overall product vision to ensure alignment from the very beginning.
What you get
Step 2
What we do: Our product strategists transform business requirements into a structured development roadmap by defining feature priorities, platform requirements, release milestones and success metrics.
What you get
Step 3
What we do: We create wireframes, user journeys, interactive prototypes and design systems that validate the user experience before development begins, ensuring consistency across iOS and Android platforms.
What you get
Step 4
What we do: Our architects design a scalable technical foundation by selecting the right cross-platform framework, defining application architecture, planning API integrations and establishing security standards.
What you get
Step 5
What we do: Our developers build your application using agile methodologies, delivering functionality in iterative sprints with continuous collaboration, progress reviews and transparent reporting.
What you get
Step 6
What we do: We perform comprehensive testing throughout development, including functional testing, automated testing, performance validation, security assessments and cross-device compatibility testing.
What you get
Step 7
What we do: We manage the complete application deployment process, including app store submissions, compliance reviews, release management and production environment configuration.
What you get
Step 8
What we do: After launch, we continuously monitor, maintain and enhance your application to ensure optimal performance, security, platform compatibility and business growth.
What you get
Proof Of Work
Sphinx Solutions show you outcomes, not just portfolios. Every application below is measured against the business problem it was built to solve.
TENX
Sphinx built a global networking platform for entrepreneurs
A platform that could bring entrepreneurs, founders, investors and business leaders together to network, collaborate, share opportunities and build meaningful professional relationships from anywhere in the world.
To develop a scalable networking and collaboration platform capable of supporting user engagement, real-time interactions, community building and seamless networking experiences across a growing global audience.
A feature-rich networking application with user profiles, collaboration tools, community engagement features, messaging capabilities and a scalable backend designed to connect entrepreneurs worldwide and foster meaningful business relationships.
ACE ELITE SERVICES
Sphinx developed a premium airport transportation booking platform
A platform that would allow travellers to pre-book airport transportation, manage memberships, track rides, receive real-time updates and enjoy a seamless luxury travel experience through a single application.
To build a secure and scalable cross-platform application with GPS tracking, payment integration, membership management, ride scheduling, push notifications and a frictionless customer journey.
A cross-platform mobile application featuring airport ride pre-booking, membership subscriptions, GPS tracking, payment gateway integration, driver and vehicle updates, push notifications, and an intuitive user experience designed to improve customer satisfaction and retention.
Every solution we build is AI-ready by architecture, so your business grows smarter. We engineer software around the way your business works: its processes, integrations and growth targets. We bring years of delivery precision to every project across the world.
Industries
Sphinx Solutions brings deep domain expertise to cross-platform mobile development across a broad range of industries. We do not just build apps; we understand the business context that makes them succeed.
How much does it cost?
Cross-platform app development costs vary depending on application complexity, feature requirements, third-party integrations, UI/UX design, technology framework and deployment scope.
Use our app cost calculator to estimate your project budget based on your unique business requirements and development goals.
Try app cost calculatorWhat the calculator gives you
Why Sphinx
There are hundreds of mobile development companies. Here is what makes Sphinx Solutions the right choice for organisations that need to get it right.
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Since 2010, Sphinx Solutions has been building mobile applications at the intersection of performance, design and business strategy. We have seen every wave of mobile technology and we bring that institutional knowledge to every project.
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Our cross-functional agile teams operate in two-week sprints with regular demos, transparent backlogs and continuous delivery. You always know what is being built, why, and when it ships.
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Weekly status reports, real-time project dashboards, and open access to your development backlog. We operate with complete visibility: no black boxes, no surprises.
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Every line of code, every design asset and every technical deliverable we build for you is fully and exclusively yours. We transfer complete intellectual property ownership at project completion.
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ISO-certified development processes, NDA-protected engagements, secure code repositories and rigorous data handling protocols. Security is not an add-on: it is embedded in how we work.
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With development centres in India and client engagement teams serving North America, Europe, the Middle East and Southeast Asia, we provide enterprise-quality delivery at a competitive global cost structure.
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Our engineering teams are actively trained in AI-augmented development, using LLMs for code generation acceleration, automated testing, documentation and intelligent QA, without compromising code quality.
How We Engage
As a leading cross-platform app development company, we offer flexible engagement models designed to match your project scope, budget, timeline and business objectives. We provide complete transparency, delivery accountability and full IP ownership.
01
A clearly defined project scope, fixed budget and milestone-based delivery model, ideal for businesses with well-documented requirements and predictable timelines. This engagement model works best for MVPs, proofs-of-concept, and cross-platform applications where cost certainty and delivery predictability are essential.
02
A sprint-based engagement model that provides the flexibility to adapt features, priorities and requirements as your product evolves. Designed for startups, SaaS platforms, AI-powered applications and growing businesses that rely on continuous feedback, rapid iteration and evolving market opportunities.
03
A fully managed team of cross-platform app developers, designers, QA engineers and project managers working as an extension of your organisation. This model is ideal for long-term product development, enterprise applications, digital transformation initiatives, and businesses seeking ongoing mobile innovation without the overhead of building an in-house team.
Book a 30-minute free consultation.
Expert Insights
For enterprise applications where Microsoft tooling is central to your architecture, .NET MAUI is the clear choice. We evaluate your project during the discovery phase and recommend the framework that best serves your business goals, not our convenience.
Why Choose Us
Sphinx has completed 16 successful years in the industry, helping businesses with technology and digital transformation, including AI-powered solutions across major industry verticals.
We have a dedicated and reliable team of AI engineers, ML scientists, data engineers, and MLOps specialists covering every role in the AI development lifecycle.
We have delivered more than 1,500 solutions through a results-driven approach, many to recurring clients who keep expanding their AI capabilities with us.
We have a dedicated in-house team, experienced and skilled across AI development, software engineering, QA, DevOps, and cloud infrastructure.
We are trusted by 750+ clients for best-in-class AI solutions at competitive rates, with the delivery accountability enterprise clients demand.
Our client-centric approach and high-calibre AI engineering, built on current models and frameworks, have made us a trusted partner for businesses building AI.
Connect with us
Tell us what you want to build and we’ll recommend the framework, scope and timeline.
Everything you need to know about building cross-platform with us. Can’t find your answer? Talk to us.
Usually, yes. One codebase serves both iOS and Android, so you write and maintain less code than you would building two native apps. That tends to shorten the timeline and lower the total cost, and it means you don’t have to staff two separate teams.
A native app is built for one operating system with that platform’s own tools, like Swift for iOS or Kotlin for Android. A cross-platform app shares one codebase across both. You give up a little raw platform integration in exchange for faster builds, lower cost and simpler maintenance, though for most apps the difference in feel is hard to notice.
Yes. Our designers build interfaces that work well on both iOS and Android. We keep your brand consistent while respecting each platform’s design conventions, so the app feels native rather than like a port.
Yes. We move native and legacy apps to frameworks like Flutter and React Native. We plan the migration to keep disruption low and preserve the features your users rely on, and a single codebase usually cuts what you spend on maintenance afterwards.
They can. Current frameworks reach the camera, GPS, biometric login, push notifications, Bluetooth, sensors and payment systems directly, so you don’t have to trade away performance to get a fully featured app.
Yes. We integrate features such as generative AI, chatbots, recommendation engines, predictive analytics, computer vision and voice assistants to help you engage users, automate routine work and personalise the experience.
We design the architecture carefully and test throughout the build, not just at the end. That covers performance benchmarking, testing across a range of devices, code optimisation and QA, so the app stays fast and consistent on both iOS and Android.
It depends on how complex the app is, which features and integrations you need, the design work involved, the tech stack and the timeline. A simple MVP costs far less than a full enterprise app. For a tailored estimate, try our app cost calculator.
