Cross-Platform App Development Services | Build Once, Launch Everywhere

Reach Every User Without Building Twice

You need an app on iOS and Android. Your budget says pick one. Your timeline says hurry. Your users say both.

Sound familiar? This is the cross-platform dilemma thousands of businesses face. Building separate native apps means double the time, double the cost, and double the headaches. What if you could launch on both platforms simultaneously—with one codebase, one team, and one timeline?

At BirajTech, we build cross-platform applications that work beautifully on iOS, Android, and web from a single codebase. Using Flutter, React Native, and modern frameworks, we create apps that feel native, perform flawlessly, and reach your entire audience—without breaking the bank or missing your launch date.

Get Your Free Project Estimate →

What Is Cross-Platform App Development?

Think of cross-platform development as writing one letter that automatically translates into multiple languages.

Traditional native development means building two completely separate apps—one in Swift for iOS, another in Kotlin for Android. Different codebases, different teams, different bugs, different timelines. When you want to add a feature, you build it twice. When you find a bug, you fix it twice.

Cross-platform development flips this model. We write code once using frameworks like Flutter or React Native, and it runs on both iOS and Android. The app looks, feels, and performs like a native app on each platform—but you only build it once.

The result? You reach 100% of mobile users in half the time and at a fraction of the cost.

Who this works for:

  1. Startups launching their first app with limited budgets
  2. Businesses targeting both iOS and Android users simultaneously
  3. Companies needing faster time-to-market
  4. Teams wanting easier maintenance and updates
  5. Anyone who doesn't want to pay for two separate apps

Why Businesses Choose Cross-Platform Development

Launch Faster, Win First

The cross-platform app development framework market is growing from USD 15.67 Billion in 2025 to USD 42.60 Billion by 2034—businesses are choosing speed over tradition. While competitors build separate iOS and Android apps over 8-10 months, you can launch on both platforms in 4-6 months.

First-mover advantage matters. Being first means capturing users, gathering feedback, iterating quickly, and dominating your niche before others arrive.

Save 40-60% on Development Costs

Building two native apps means paying for two development teams, two QA processes, two sets of bugs, and two maintenance cycles. Cross-platform development uses shared code, reducing costs dramatically.

Typical savings:

  1. One development team instead of two separate iOS and Android teams
  2. Single codebase to maintain and update
  3. Shared bug fixes across all platforms
  4. Unified testing process

Startups especially benefit—stretching limited budgets further while still reaching every user.

One Update, Every Platform

Found a bug? Add a new feature? With native apps, you fix it twice. With cross-platform apps, you fix it once, and all users benefit immediately.

This means:

  1. Faster bug fixes reaching all users
  2. Features launching simultaneously on iOS and Android
  3. Consistent user experience across platforms
  4. Less technical debt accumulating over time

Near-Native Performance

Modern frameworks have eliminated old performance concerns. Apps built with Flutter or React Native deliver smooth animations, quick load times, and responsive interfaces that users can't distinguish from native apps.

We optimize for:

  1. Fast app launch times
  2. Smooth 60fps animations
  3. Efficient memory usage
  4. Quick API response handling
  5. Minimal battery drain

Wider Market Reach

Why choose between iOS users and Android users when you can have both? Cross-platform development lets you maximize audience reach from day one.

Consider this: Android dominates globally with 70%+ market share, while iOS users in the US and Europe spend more per transaction. You need both audiences. Cross-platform development delivers them simultaneously.

Our Cross-Platform Development Services

Flutter App Development

Flutter is Google's framework for building beautiful, natively compiled applications from a single codebase. We use Flutter to create apps that look stunning and perform flawlessly on iOS, Android, web, and desktop.

Why Flutter works:

  1. Single codebase for all platforms
  2. Beautiful, customizable UI components
  3. Hot reload for instant changes during development
  4. Native-level performance
  5. Growing ecosystem and strong community

Perfect for: Startups, MVPs, consumer apps, e-commerce platforms, social apps.

React Native App Development

Created by Facebook (now Meta), React Native lets us build apps using JavaScript while maintaining native performance. If you already have a web development team, React Native leverages existing JavaScript skills.

Why React Native works:

  1. JavaScript/TypeScript—familiar to most developers
  2. Large library of pre-built components
  3. Strong community and third-party packages
  4. Easy integration with existing native code
  5. Used by Facebook, Instagram, Shopify, and more

Perfect for: Teams with JavaScript expertise, apps needing complex integrations, projects requiring rapid prototyping.

Progressive Web Apps (PWAs)

PWAs work directly in browsers but feel like native apps. They load instantly, work offline, send push notifications, and can be added to home screens—without app store downloads.

Why PWAs work:

  1. No app store approval process
  2. Instant updates without user downloads
  3. Single codebase for all devices
  4. Lower development costs
  5. Easy discoverability through search engines

Perfect for: Content platforms, e-commerce sites, B2B tools, market testing.

Hybrid App Development

Combining web technologies with native capabilities, hybrid apps use frameworks like Ionic and Cordova to deliver cross-platform experiences efficiently.

Why hybrid works:

  1. Leverage existing web development skills (HTML, CSS, JavaScript)
  2. Quick development cycles
  3. Cost-effective for simple to medium complexity apps
  4. Access to device features through plugins

Perfect for: Content-heavy apps, internal business tools, proof-of-concepts.

Cross-Platform MVP Development

Have an idea but unsure if it'll work? We build Minimum Viable Products that test your concept on real users—fast and affordably.

Our MVP process:

  1. Define core features only
  2. Build and launch in 8-12 weeks
  3. Gather real user feedback
  4. Iterate based on data, not assumptions
  5. Scale up once validated

Perfect for: First-time founders, new product testing, market validation.

App Modernization & Migration

Stuck with an old native app that's expensive to maintain? We migrate existing iOS or Android apps to cross-platform frameworks, modernizing functionality while reducing future costs.

What we migrate:

  1. Legacy native apps to Flutter or React Native
  2. Separate iOS/Android apps to single codebase
  3. Outdated frameworks to modern solutions
  4. Code refactoring for better performance

How Cross-Platform Development Works

Phase 1: Discovery & Planning

We start by understanding your business goals, target audience, and feature requirements. What platforms do your users prefer? What's your timeline? What's your budget?

You'll get a project roadmap showing features, technology recommendations, timeline, and cost estimate.

Phase 2: Design & Prototyping

Our designers create interfaces that feel native on each platform while maintaining your brand identity. iOS users get iOS conventions; Android users get Material Design patterns—all from the same codebase.

You'll test interactive prototypes on actual devices before development begins.

Phase 3: Development Sprints

We build in 2-3 week sprints, delivering working versions regularly. You're not waiting months to see progress—you're testing features as we complete them.

Our developers write clean, maintainable code following best practices for your chosen framework (Flutter, React Native, etc.).

Phase 4: Testing & Quality Assurance

Comprehensive testing across:

  1. Different iOS versions and devices
  2. Various Android manufacturers and screen sizes
  3. Different network conditions (4G, 5G, WiFi, offline)
  4. Performance benchmarks
  5. Security vulnerabilities

We test on real devices—not just simulators—to catch platform-specific issues.

Phase 5: Deployment

We handle submission to both Apple App Store and Google Play Store, managing the approval process and optimizing your store listings for maximum visibility.

Phase 6: Post-Launch Support

After launch, we monitor performance, fix bugs, release updates, and add features based on user feedback. Your app evolves with your business.

Technologies We Use

  • Frameworks: Flutter, React Native, Ionic, Xamarin, .NET MAUI
  • Languages: Dart (Flutter), JavaScript/TypeScript (React Native), HTML/CSS
  • Backend: Node.js, Python, Firebase, AWS, Google Cloud
  • Databases: PostgreSQL, MongoDB, Firebase Firestore, SQLite
  • State Management: Redux, MobX, Provider, Riverpod, BLoC
  • APIs & Integration: REST APIs, GraphQL, third-party SDKs
  • Testing: Jest, Detox, Flutter Test, XCTest, Espresso
  • CI/CD: GitHub Actions, Bitrise, Codemagic, Fastlane
  • Analytics: Firebase Analytics, Mixpanel, Google Analytics
  • Payment: Stripe, PayPal, Razorpay, in-app purchases

Industries We Serve

E-commerce & Retail - Shopping apps with product catalogs, secure checkout, order tracking, and loyalty programs reaching both iOS and Android shoppers.

Healthcare & Telemedicine - Patient portals, teleconsultation platforms, appointment booking, and health tracking accessible across all devices.

Finance & Fintech - Banking apps, digital wallets, investment platforms, and payment solutions with bank-level security.

Education & E-learning - Interactive learning platforms, virtual classrooms, course management, and student engagement tools.

Food Delivery - Restaurant discovery, ordering systems, real-time tracking, and payment integration for hungry users everywhere.

Travel & Tourism - Booking platforms, itinerary planners, travel guides, and local recommendations for travelers on any device.

Real Estate - Property listings, virtual tours, mortgage calculators, and agent communication tools for buyers and sellers.

Fitness & Wellness - Workout trackers, nutrition guides, meditation apps, and progress monitoring integrated with wearables.

Entertainment & Media - Streaming platforms, content discovery, social features, and engagement tools for millions of users.

On-Demand Services - Service provider marketplaces connecting users with professionals for home services, beauty, transportation, and more.

Why Choose BirajTech for Cross-Platform Development

Framework Expertise

We are proficient in Flutter, React Native, and modern cross-platform frameworks. We'll recommend the right technology for your specific needs—not just what we prefer building.

Platform-Specific Design

Cross-platform doesn't mean identical. We design interfaces that respect each platform's conventions while maintaining your brand consistency.

Performance Optimization

Slow apps get deleted. We optimize code, minimize app size, implement lazy loading, and ensure smooth performance even on older devices

Single Codebase, Native Feel

Your users won't know it's cross-platform. The app feels native on iOS and Android because we implement platform-specific patterns and behaviors.

Cost Transparency

No surprise costs. We provide detailed estimates upfront and stick to them. You know exactly what you're paying for and why.

Agile Development

See progress every 2-3 weeks. Test features early. Provide feedback that shapes ongoing development. No waiting months in the dark.

Quality Assurance

Rigorous testing on real devices across iOS and Android. We catch bugs before your users do.

Post-Launch Partnership

We do not disappear after launch. Ongoing support, updates, new features, and optimization based on real user data.

Nearly a Decade of Experience

We have built cross-platform apps for startups, SMBs, and enterprises across industries. We've solved the problems you'll face before you encounter them.

Cross-Platform vs. Native Development: Making the Right Choice

Choose Cross-Platform when:

  1. You need to launch on both iOS and Android quickly
  2. Budget is a major constraint
  3. Your app doesn't require heavy device-specific features
  4. You want faster time-to-market
  5. Easier maintenance matters
  6. Your team has limited native development expertise

Choose Native when:

  1. You need maximum performance for graphics-intensive apps (3D games, AR/VR)
  2. Deep integration with platform-specific hardware is essential
  3. Budget allows for separate teams
  4. You are targeting only one platform initially
  5. App requires cutting-edge platform features immediately

Not sure which is right? We'll analyze your requirements and recommend the approach that delivers the best results for your specific situation.

Frequently Asked Questions

Will my cross-platform app perform as well as a native app?

Yes. Modern frameworks like Flutter and React Native deliver near-native performance for most applications. Users won't notice the difference. However, extremely graphics-intensive apps (like 3D games) might benefit from native development.

How long does it take to build a cross-platform app?

Simple apps: 2-4 months
Medium complexity: 4-6 months
Complex apps: 6-12 months
Cross-platform development is typically 40-50% faster than building separate iOS and Android apps. 

Which framework is better: Flutter or React Native?

Both are excellent. Flutter offers better performance and smoother animations. React Native has a larger community and more third-party libraries. We'll recommend the right framework based on your project requirements, timeline, and team expertise.

Can you convert my existing native app to cross-platform?

Yes. We migrate existing iOS or Android apps to cross-platform frameworks, modernizing functionality while reducing maintenance costs. The process typically takes 2-4 months depending on app complexity.

Will my app look the same on iOS and Android?

Not exactly—and that's good. We design interfaces that respect platform conventions. iOS users get iOS patterns; Android users get Material Design. The brand identity remains consistent, but the user experience feels native to each platform.

Can cross-platform apps access device features like camera, GPS, and push notifications?

Absolutely. Cross-platform frameworks provide access to all device features—camera, GPS, bluetooth, biometric authentication, push notifications, and more through plugins and native modules.

Do you handle App Store and Google Play submission?

Yes. We manage the complete submission process for both stores, including preparing listings, screenshots, descriptions, and handling the approval process.

What happens after the app launches?

We provide ongoing support including bug fixes, performance monitoring, updates for new OS versions, feature additions, and optimization based on user analytics.

Can I add features later after the initial launch?

Definitely. Starting with an MVP and adding features based on user feedback is smart. Cross-platform development makes adding features easier since changes apply to both platforms simultaneously.

Do you provide the source code?

Yes. Upon project completion and final payment, you receive complete source code ownership and all project documentation.

Will my app work offline?

We can build offline functionality, allowing users to access content and perform actions without internet. Data syncs when connection is restored.

How do you ensure my app is secure?

Security is built into every layer—encrypted data storage, secure API communication, authentication best practices, regular security audits, and compliance with platform security guidelines.

Can you integrate my app with existing systems?

Yes. We integrate with existing websites, databases, CRM systems, payment gateways, third-party APIs, and enterprise software.

What if I'm not satisfied with the development progress?

We work in agile sprints with regular demos and feedback sessions. You're involved throughout the process, so there are no surprises. If issues arise, we address them immediately.

Ready to Build Your Cross-Platform App?

You don't need two separate apps to reach everyone. With cross-platform development, you can launch faster, spend smarter, and reach every user—iOS, Android, and web.

Nearly a decade of experience building successful cross-platform applications for startups and enterprises. Expert developers, transparent pricing, and a process that delivers results.

Stop choosing between platforms. Build once. Launch everywhere.

Start Your Project Today →

Let's turn your idea into an app that works everywhere.