Cross-Platform App Development

Most businesses need to reach both iOS and Android users. Building separate native apps for each doubles your cost and timeline. We build cross-platform apps in Flutter and React Native — native-quality performance, one unified build.

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Get Your Query.!

IS CROSS-PLATFORM RIGHT FOR YOU?

Not every product needs native development. The right approach depends on what you are building.

Cross-platform is the right fit when:

  • You need iOS and Android without the cost of two separate builds
  • Speed to market matters and a shared codebase gets you there 30–40% faster
  • Your core features do not require deep, platform-specific hardware access
  • You are validating an MVP before committing to a larger investment

Native development makes more sense when:

  • Your app relies heavily on HealthKit, ARKit, Apple Watch, or Android-specific sensors
  • You need maximum hardware performance for AR, real-time video, or complex rendering
  • You are building for a single platform only

We assess your product during discovery and give you a straightforward recommendation — before any budget is committed.

react and flutter section image

FRAMEWORKS

Flutter and React Native What We Use & Why

We build with both frameworks. The recommendation depends entirely on your product.

Flutter (Google · Dart)

The stronger choice for pixel-perfect custom UI, animation-heavy experiences, and products that need to look and feel identical across iOS and Android. Flutter compiles directly to native code — no JavaScript bridge, consistent rendering on every device.

React Native (Meta · JavaScript / TypeScript)

The stronger choice when your team already works in JavaScript, when you need each platform to feel distinctly native, or when you need access to a large ecosystem of existing libraries. Supports Expo for rapid development and bare workflow for deep native customization.

WHY CROSSWAY

The Right Framework. The Right Team. The Full Cycle.

What We Do What That Means For You
Honest framework guidanceFlutter and React Native are not interchangeable. We evaluate your product requirements and recommend the right framework — not the one that is trending. If native development genuinely serves you better, that is what we will recommend.
One team across both platformsDesign, engineering, QA, and post-launch support are handled by the same team throughout. No separate contractors for iOS and Android. No coordination gaps. No version drift between platforms at launch.
Performance treated as a requirementSlow cross-platform apps are an engineering problem. We profile, optimize, and test on real mid-range devices — because most users are not on flagship hardware. .
Compliance from the startHIPAA, SOC 2, PCI — regulated industries cannot retrofit compliance after a build. It costs significantly more and creates real risk. We architect for it from day one.
Full visibility throughoutTwo-week sprints. Bi-weekly live demos. Direct Slack access to your project team. At any point, you can see exactly where your product stands.

Our Cross-Platform App Development Services

software
Software Development

Custom Cross-Platform App Development

End-to-end Flutter or React Native development from discovery through post-launch support. A single codebase that covers iOS and Android, with platform-specific UI patterns so each version feels native to its users.

mobile-development services
Custom Mobile App Development

Cross-Platform MVP Development

A focused, working product on both platforms in 6–10 weeks. Enough to gather real user feedback, validate core assumptions, and give investors something tangible to evaluate.

app-development
Custom Web App Development

UI/UX Design

Adaptive design from a single Figma source — Human Interface Guidelines for iOS, Material You for Android. Platform-specific navigation and component patterns built in, so the app feels right on both without looking like a compromise.

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Custom Web App Development

API Integration and Backend Development

We build the backend alongside the app — Node.js, Python, Firebase, AWS, Google Cloud. REST or GraphQL, real-time sync, offline-first architecture, push notifications. One team handling the full stack, not two separate vendors.

seo
Search Engine Optimization Ranking

Cross-Platform App Modernization

Existing hybrid app or an outdated React Native project? We audit the codebase, migrate to current framework versions, refactor the architecture, and extend functionality without a full rebuild.Building the next community platform, marketplace, or content product? We architect real-time features — chat, feeds, notifications, user profiles, content moderation — with backend infrastructure built for millions of concurrent users.

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Digital Arts

Performance Optimization

A slow cross-platform app is a code quality issue, not a framework limitation. We profile render performance, reduce bridge overhead in React Native, optimize Flutter widget trees, minimize bundle size, and test on real mid-range devices — not just flagship hardware.

MVP Services for App
MVP Application Development

App Store and Google Play Launch

Full submission management for both stores — metadata, screenshots, store listing copy, compliance review. Our apps pass review on the first submission.

Our Cross-Platform App Development Process

Discovery to Launch — How It Works

Every project runs on two-week sprints with live demos. You see working software at every stage — not progress reports.

1
Discovery & Strategy
Week 1–2

We map your business goals, target users, and technical requirements. You receive a framework recommendation, clear project scope, and a realistic roadmap before development begins.

Project briefScope of workTech recommendationPreliminary roadmap
2
UX Research & Design
Week 2–4

Adaptive prototypes in Figma, designed for both platforms from a single source. iOS and Android navigation patterns handled independently. Design is reviewed and approved before development starts.

WireframesClickable prototypeDesign system
3
Development
Week 4–12+

Two-week sprints with bi-weekly demos and direct access to your project team. Every sprint delivers tested, working software on both platforms.

Working software incrementsUnit testsDocumentation
4
Quality Assurance
Parallel + dedicated sprint

Functional, performance, and compatibility testing across real iOS and Android devices. App Store and Google Play submission standards verified before launch.

QA reportBug-free release candidate
5
Dual-Store Launch
Week 12–14+

Simultaneous submission to the App Store and Google Play — metadata, screenshots, store listing copy, and compliance review for both stores handled in full.

Published appLaunch monitoring dashboard
6
Post-Launch Support
Ongoing

Performance monitoring, OS compatibility updates, crash reporting, over-the-air updates via CodePush or Shorebird, and feature iteration. Most clients continue on a monthly retainer after launch.

Monthly performance reportsOngoing release cycle

TECH STACK

What We Build With

Frameworks

Tools

Flutter (Dart) React Native (TypeScript / JS)

State Management

Tools

Riverpod BLoC (Flutter) · Redux Zustand (React Native)

Navigation

Tools

Go Router (Flutter) React Navigation (React Native)

Native Modules

Tools

Swift (iOS) Kotlin (Android)

Testing

Tools

Flutter Test Maestro · Jest Detox

OTA Updates

Tools

Shorebird (Flutter) CodePush (React Native)

Backend

Tools

Node.js Python Firebase FastAPI

Cloud

Tools

AWS Google Cloud Firebase

CI/CD

Tools

GitHub Actions Fastlane Bitrise Xcode Cloud

Payments

Tools

Stripe Apple Pay Google Pay StoreKit 2

AI / ML

Tools

TensorFlow Lite ML Kit OpenAI API

Push Notifications

Tools

APNs (iOS) FCM (Android)
industries we serve.
Healthcare​

Healthcare & MedTech

HIPAA-compliant patient apps, telehealth platforms, wearable integration. Delivered: Empowered People, Behavioral Therapy App.

Automotive

E-Commerce & Retail

Mobile storefronts, Apple Pay and Google Pay, loyalty programs, AR product experiences.

Finance

Fintech & Banking

Secure payment apps, digital wallets, investment dashboards. Biometric authentication and encryption from day one.

Education

Education and EdTech

LMS platforms, gamified learning tools, student-teacher communication apps.

Real Estate

Real Estate & PropTec

Property search, virtual tours, mortgage tools. Delivered: Land Buy.

Hospitality

Maritime & Cargo

Vessel tracking, cargo management, compliance reporting. Delivered: ShipSearch.

Work We're Proud Of

These aren’t concept projects. They’re products in active use — built by Crossway Consulting, live in the real world.

Empowered People

HIPAA-compliant mental health platform for clinical teams — real-time collaboration, crisis workflow management, and secure patient communication on iOS and Android.

App DevUX/UILead Gen
Behavioral Therapy App

Cross-platform mental health assessment and treatment tracking application with on-device machine learning, biometric login, offline mode, and wearable sync.

App DevAI Integration
Land Buy

Property search and transaction platform with advanced filters, saved listings, agent contact tools, and mortgage calculator — launched simultaneously on iOS and Android.

iOS DevUX/UIWeb Design
ShipSearch

Maritime cargo management platform with real-time vessel tracking, operational logistics tools, and compliance reporting — delivered as a complete mobile and web solution.

Web AppMobile AppFull Digital

Frequently Asked Questions

It depends on the product. Flutter is the better choice for custom UI, consistent cross-platform branding, and animation-intensive experiences. React Native is the better choice when your existing team works in JavaScript, when you need platform-native look and feel, or when deep integration with a native codebase is required. We make the recommendation after reviewing your requirements — not based on preference.

In most cases, 30 to 40 percent faster, with proportional cost savings, since 80 to 90 percent of the codebase is shared. That advantage narrows when a product requires extensive native modules for platform-specific functionality. We give you a realistic assessment during discovery.

For the majority of product types — business applications, marketplaces, healthcare tools, logistics platforms, social products — cross-platform performance is comparable to native. Native has a clear advantage in compute-intensive work: real-time AR, complex 3D rendering, intensive video processing. If your product falls into that category, we will tell you during scoping.

iOS ships a major update annually. Android follows a similar release cadence. We monitor these releases and handle compatibility updates for clients on a monthly retainer as a standard part of support

Yes. Both Flutter and React Native support native module integration. Face ID, Touch ID, Apple Pay, Google Pay, push notifications, deep linking, camera, and location services are all accessible through native bridges when required.

Yes — full submission for both stores at the same time. Metadata, screenshots, store listing copy, compliance review, and post-launch monitoring for iOS and Android handled together.

 Yes. We work with existing Flutter and React Native codebases — framework upgrades, architecture refactoring, performance issues, or new feature development. We conduct a codebase audit before committing so both sides understand the scope of work.

GET STARTED

A free 60-minute strategy session covers your product requirements, framework recommendation, feasibility assessment, and a preliminary roadmap. Every engagement begins with a signed NDA.

Call us: 817.875.7777