Cross Platform App Development for iOS and Android
React Native and Flutter specialists building high-performance mobile apps from a single codebase — delivered on time and on budget.
- One codebase. Two platforms. Half the cost.
- React Native and Flutter specialists
- Full-cycle delivery — strategy through launch
- Dedicated support throughout and after launch
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Cross Platform App Development Services
From consulting through launch — every service you need to build, ship, and grow a successful mobile app.
Cross Platform App Consulting
We help businesses make the right architecture and platform decisions before development begins. Our consultants assess your product requirements, target users, and business goals to recommend the development approach — cross platform or native — that gives you the best outcome.
If cross platform is the right fit, we define which framework, which architecture, and which development approach suits your product specifically. We completely understand that your business requirements must be unique, and so should your cross-platform app.
React Native App Development
React Native is our primary framework for cross platform app development when the project benefits from JavaScript's ecosystem, web team alignment, or strong third-party library support. We build React Native applications that perform reliably on both iOS and Android, with clean architecture and a codebase that is easy to maintain and extend.
React Native's component-based architecture, combined with its ability to access native device APIs directly, makes it a strong choice for a wide range of business mobile applications, from customer-facing consumer apps to internal enterprise tools.
Flutter App Development
Flutter is our preferred framework when visual consistency and UI performance are the top priority. Flutter renders its own UI components rather than relying on platform UI elements, which means your app looks and behaves identically on iOS and Android. It is also significantly faster to build complex, animated interfaces in Flutter than in most alternatives.
Flutter's performance characteristics are strong — it compiles to native ARM code — and Google's continued investment in the platform makes it a stable, long-term technology choice.
Cross Platform UI/UX Design
Designing for cross platform requires thinking about two platforms simultaneously. We design mobile interfaces that feel natural to users on both iOS and Android — respecting each platform's conventions while maintaining a consistent brand experience across both.
Our design process produces a unified design system that works across platforms, reducing design complexity without producing something that feels generic or out of place on either platform.
Cross Platform MVP Development
If you are validating a mobile product idea, cross platform development is often the most sensible approach. You reach users on both major platforms from a single build, at a fraction of the cost of building two native apps. We scope cross platform MVPs around your core user need, build them properly, and get them to market fast.
Cross Platform App Integration Services
Mobile apps need to connect with payment systems, analytics tools, CRMs, backend databases, and third-party APIs. We handle all of these integrations as part of our cross platform app development services, ensuring your app works reliably within your existing business ecosystem.
Cross Platform App Testing and QA
Testing a cross platform app means testing on both platforms — across multiple OS versions, screen sizes, and device types. Our QA process is structured to cover this complexity, catching platform-specific issues before they reach your users.
Cross Platform App Maintenance and Support
After launch, your cross platform app needs ongoing maintenance as both iOS and Android release OS updates, as third-party libraries change, and as your product roadmap evolves. Primus provides structured post-launch support to keep your app stable, compliant, and current on both platforms.
We help businesses make the right architecture and platform decisions before development begins. Our consultants assess your product requirements, target users, and business goals to recommend the development approach — cross platform or native — that gives you the best outcome.
If cross platform is the right fit, we define which framework, which architecture, and which development approach suits your product specifically. We completely understand that your business requirements must be unique, and so should your cross-platform app.
React Native is our primary framework for cross platform app development when the project benefits from JavaScript's ecosystem, web team alignment, or strong third-party library support. We build React Native applications that perform reliably on both iOS and Android, with clean architecture and a codebase that is easy to maintain and extend.
React Native's component-based architecture, combined with its ability to access native device APIs directly, makes it a strong choice for a wide range of business mobile applications, from customer-facing consumer apps to internal enterprise tools.
Flutter is our preferred framework when visual consistency and UI performance are the top priority. Flutter renders its own UI components rather than relying on platform UI elements, which means your app looks and behaves identically on iOS and Android. It is also significantly faster to build complex, animated interfaces in Flutter than in most alternatives.
Flutter's performance characteristics are strong — it compiles to native ARM code — and Google's continued investment in the platform makes it a stable, long-term technology choice.
Designing for cross platform requires thinking about two platforms simultaneously. We design mobile interfaces that feel natural to users on both iOS and Android — respecting each platform's conventions while maintaining a consistent brand experience across both.
Our design process produces a unified design system that works across platforms, reducing design complexity without producing something that feels generic or out of place on either platform.
If you are validating a mobile product idea, cross platform development is often the most sensible approach. You reach users on both major platforms from a single build, at a fraction of the cost of building two native apps. We scope cross platform MVPs around your core user need, build them properly, and get them to market fast.
Mobile apps need to connect with payment systems, analytics tools, CRMs, backend databases, and third-party APIs. We handle all of these integrations as part of our cross platform app development services, ensuring your app works reliably within your existing business ecosystem.
Testing a cross platform app means testing on both platforms — across multiple OS versions, screen sizes, and device types. Our QA process is structured to cover this complexity, catching platform-specific issues before they reach your users.
After launch, your cross platform app needs ongoing maintenance as both iOS and Android release OS updates, as third-party libraries change, and as your product roadmap evolves. Primus provides structured post-launch support to keep your app stable, compliant, and current on both platforms.
Native vs Cross Platform: How to Decide
One of the first decisions Primus's clients face when building a mobile app is whether to go native or cross platform. It is an important decision, and the right answer depends on your:
Cross platform development means building one app and using it for both platforms:
Modern cross platform frameworks like React Native and Flutter have closed the performance gap with native significantly.
Build one app. Reach both platforms.
Cross platform development gives you the reach of two native apps at a fraction of the time and cost. Let's talk about your project.
Book a Free CallOur App Development Process
A clear, structured process from first conversation to live app — no surprises, no delays.
Discovery and Product Strategy
UI/UX Design
Development
Testing and QA
App Store and Google Play Submission
Ongoing Support and Optimization
Discovery and Product Strategy
Every cross platform project starts with structured discovery. We define your product goals, user needs, feature requirements, and platform-specific considerations. This phase produces a clear roadmap and architecture plan before development begins.
Key deliverables:
UI/UX Design
We design a unified interface that works across iOS and Android while respecting each platform's conventions. User flows, wireframes, and high-fidelity prototypes are validated before development starts.
Key deliverables:
Development
We build in agile sprints with continuous integration across both platforms. Every sprint delivers testable builds on iOS and Android. Code reviews, documentation, and client progress updates are part of every cycle.
Key deliverables:
Testing and QA
We test on real iOS and Android devices across multiple OS versions. Platform-specific testing ensures the app performs consistently on both, catching issues that only appear on one platform before launch.
Key deliverables:
App Store and Google Play Submission
We manage submission to both stores simultaneously: metadata, screenshots, compliance review, and release configuration for both App Store and Google Play in a single coordinated process.
Key deliverables:
Ongoing Support and Optimization
After launch, we monitor performance across both platforms, manage OS update compatibility, address user feedback, and continue product development based on your roadmap.
Our Tech Stack
React Native, Flutter, and the supporting infrastructure we use to build reliable, scalable cross platform apps.
React Native
React Native Core
Facebook's open-source framework for building cross platform mobile apps using JavaScript and React. React Native bridges JavaScript code with native platform APIs, delivering near-native performance with a single, shared codebase.
JavaScript and TypeScript
We build React Native projects in TypeScript for type safety, better code documentation, and fewer runtime errors. TypeScript significantly improves the maintainability of large cross platform codebases.
Expo
For projects that benefit from faster setup and managed build pipelines, we use Expo as a layer on top of React Native. Expo accelerates early-stage development and simplifies over-the-air update deployment.
React Navigation
Our navigation library of choice for React Native apps, handling screen transitions, deep linking, tab bars, and modal flows cleanly across both platforms.
Redux / Zustand
For state management in React Native applications. We choose between Redux (for large, complex state structures) and Zustand (for leaner, more straightforward state requirements) based on the product's architecture needs.
Built for Every Stage of Business
Whether you are a startup validating an idea or an enterprise scaling operations — we have the model to match.
Startups
Cross platform is often the natural choice for startups that need to reach iOS and Android users quickly and efficiently. We help startups launch on both platforms simultaneously, with MVPs that are production-ready and architecturally sound.
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Small and Medium Businesses
We build cross platform apps for SMBs adding a mobile channel, improving field operations, or building a customer-facing product. The cost efficiency of cross platform development makes it accessible for SMB budgets without compromising on quality.
Start a ProjectB2B Companies
We develop cross platform apps for B2B businesses supporting field teams, client portals, service delivery, and operational workflows. Cross platform architecture means one development team, one codebase, and one maintenance process.
Start a ProjectEnterprises
For enterprise organizations standardizing mobile tooling across large teams, cross platform development reduces the complexity of managing separate iOS and Android development tracks. We support MDM integration, SSO, and compliance requirements.
Start a ProjectD2C and Ecommerce Brands
We build cross platform commerce apps for D2C brands that want to serve both iPhone and Android users from a single product. These apps support mobile storefronts, loyalty programs, order tracking, and customer engagement.
Start a ProjectStartups
+Small and Medium Businesses
+B2B Companies
+Enterprises
+D2C and Ecommerce Brands
+Apps Across Every Industry
From healthcare to fintech to ecommerce — we have delivered cross platform apps for businesses across every major sector.
Healthcare
We build cross platform healthcare apps for patient engagement, appointment management, telehealth, medication tracking, and remote monitoring. Every app we deliver is built with HIPAA compliance requirements from the start, so security and data privacy are never an afterthought.
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We develop cross platform property listing apps, realtor tools, virtual tour platforms, and rental management systems for real estate businesses. Agents and clients on both iOS and Android get the same reliable, well-designed experience.
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We build cross platform learning apps, virtual classrooms, student portals, and course delivery tools for educational institutions and edtech businesses. Our education apps are designed for consistent performance across devices so students and educators can access what they need without friction.
Start a ProjectFinance and Fintech
We develop secure cross platform payment apps, investment tools, digital wallets, and financial analytics platforms for fintech companies and financial service providers. Security, compliance, and reliable performance under load are built into every fintech app we deliver.
Start a ProjectEcommerce and Retail
We build cross platform mobile storefronts, loyalty programs, order management tools, and mobile POS systems for retail and ecommerce businesses. Your customers on iOS and Android get the same smooth shopping experience, connected to your backend operations in real time.
Start a ProjectTravel and Hospitality
We develop cross platform booking apps, itinerary tools, loyalty platforms, and travel experience apps for travel and hospitality businesses. Our apps are built to handle seasonal traffic demands and deliver consistent performance for travelers on both major platforms.
Start a ProjectOperating in a different industry?
Let's talkOperating in a different industry?
Let's talkWhy Businesses Choose Primus
Cross platform built right — the cost and speed advantages without the quality trade-offs.
Expert Framework Team
React Native and Flutter specialists who have shipped real products across consumer and enterprise markets.
One Codebase, Two Platforms
A single well-architected codebase that delivers a consistent, native-quality experience on both iOS and Android.
Full-Cycle Delivery
We own every phase — from strategy and design through development, QA, launch, and ongoing maintenance.
Security First
Security and compliance are built into our development process at the architecture level, not bolted on after launch.
Agile by Design
Structured sprints with client visibility at every step — you always know where the project stands and what is next.
Flexible Engagements
Fixed scope, milestone-based, or dedicated team — we match the engagement model to your project and budget.
Ready to Build Your App?
One codebase. Two platforms. Let's talk about what you want to build and how quickly we can get you to market.
Start Your ProjectFrequently Asked Questions
Common questions about cross platform mobile app development at Primus.