Cross Platform
App Development
Services
One app. Every platform. We choose the right cross-platform framework for your project — Flutter or React Native — and build iOS, Android, Web, and Desktop apps that save 60% of cost without sacrificing quality.
Flutter vs React Native vs Native — We Help You Decide
Most agencies push a single framework regardless of your needs. We run a structured decision workshop and recommend the right tool for your project, team, and budget.
Our Approach: We run a 90-minute framework selection workshop with your team in the first week. You get a written recommendation with scoring across 8 criteria (team skills, platform targets, UI requirements, performance, timeline, budget, long-term maintenance, ecosystem maturity). No pressure, no upselling.
The 60% Cost Saving is Real — Here is the Breakdown
The savings come from writing code once instead of twice. Every feature built, every bug fixed, every OS update handled — it all happens in a single codebase reviewed once, tested once, deployed to both platforms simultaneously.
The savings are highest on ongoing work. Initial development saves 45%. But feature additions save 50%, bug fixes save 55%, and adding a new platform (like Web or Desktop) saves 70% versus building that platform natively from scratch.
Complete Cross-Platform Development Package
From framework selection consulting to simultaneous multi-store deployment — everything in one engagement.
8-Step Cross-Platform Development Process
From framework strategy to simultaneous launch across all target platforms.
Platform Strategy & Framework Selection
We begin with a structured platform workshop: analysing your target users, feature requirements, team skills, and budget to produce a scored recommendation between Flutter, React Native, and native. No upselling -- we recommend what genuinely fits your project.
Architecture for Maximum Code Sharing
We design a layered architecture separating platform-agnostic business logic (domain layer), API integration (data layer), and platform-adaptive UI (presentation layer). The goal: maximize shared code while ensuring each platform delivers a native-quality experience.
Adaptive UI/UX Design System
We create a single design system in Figma with platform-adaptive variants for iOS and Android conventions. One component, two expressions: the same button, navigation, and layout components adapt their visual treatment to feel native on each platform.
Shared-First Development
We build business logic, state management, API clients, and utilities first as a shared core. Platform-specific code is written only where genuinely needed (camera UX, native payments, platform navigation). Regular cross-platform test runs on both iOS and Android from day one.
Unified QA Across All Platforms
Every feature is tested on both platforms simultaneously. We run shared test suites for business logic, platform-specific UI tests for native components, and end-to-end automation that executes against both iOS and Android in a single CI pipeline run.
Cross-Platform Security -- One Implementation
One security implementation covers both platforms: encrypted storage maps to iOS Keychain and Android Keystore automatically, certificate pinning works identically, and obfuscation covers both Dart (Flutter) or JS bundles (React Native) in a single build configuration.
Simultaneous Multi-Store Deployment
We deploy to Google Play Store and Apple App Store in a single CI/CD pipeline run using Fastlane or EAS Submit. Web builds go to Firebase Hosting or Vercel. Desktop builds are packaged for Windows/Mac App Stores. One merge triggers all deployments.
Unified Post-Launch Support
Six months of cross-platform support: a single bug fix deployed to both platforms simultaneously, framework SDK upgrades managed for all targets, unified crash monitoring dashboard, and feature iterations that ship to every platform at the same time.
Two World-Class Stacks. We Master Both.
Depending on which framework we recommend for your project, here are the full technology stacks we deploy.
Cross-Platform Apps for Every Business
Cross-platform is the right call for most product categories — here is where the cost savings are most impactful.
SaaS Mobile Extension
Add iOS + Android apps to your existing SaaS product at 50% of the cost of building two separate native apps.
E-Commerce & Retail
Unified shopping experience with shared cart, product, and checkout logic across mobile and web platforms.
On-Demand & Logistics
Customer, driver, and merchant apps from a single shared codebase with real-time tracking and push notifications.
FinTech & Payments
Secure cross-platform wallets, trading apps, and payment flows with one security implementation for both stores.
EdTech & Learning
Course content, video playback, offline downloads, and instructor dashboards from one shared codebase.
Healthcare & Wellness
Patient and practitioner apps with health data integration, available on both platforms simultaneously.
Enterprise Tools
Internal field-force, inventory, and approval apps deployed to company iOS and Android devices from one build.
Social & Community
Feeds, chat, media, and notifications with identical behaviour on iOS and Android from a single code review.
Why Choose Kotibox for Cross-Platform?
Vendor-Neutral Framework Advice
We do not specialise in only Flutter or only React Native. We master both and recommend the right one based on your project, not our internal preferences. You get an honest written recommendation with scoring.
Shared-First Architecture
We architect for maximum code sharing from day one -- typically 85 to 95%. Business logic, state, and API layers are 100% shared. UI components are shared wherever possible, with platform-specific code kept under 10%.
One Team Owns Both Platforms
A single cross-platform developer on our team can review, test, and ship to both iOS and Android. You get consistent code quality, unified documentation, and faster reviews compared to managing two separate native teams.
Production-Grade Performance
Flutter Impeller and React Native New Architecture (JSI) both deliver 60fps UIs without the performance compromises of older cross-platform approaches. We benchmark every release against native equivalents.
Single Maintenance Forever
OS updates, SDK upgrades, security patches -- handled once, deployed to both platforms. The cross-platform maintenance advantage compounds over time, making it even more cost-effective long term.
Unified CI/CD for All Stores
One CI/CD pipeline builds, tests, and submits to Google Play and App Store simultaneously. Codemagic (Flutter) or EAS Build (React Native) plus Fastlane automation -- no manual store management.
Cross-Platform Development Resources We Use
We track official releases for both frameworks and contribute to the cross-platform open-source ecosystem.
Not Sure Which Platform
Strategy Is Right For You?
Book a free 60-minute framework selection call. We analyse your project, team, and budget and give you a written Flutter vs React Native vs native recommendation with full cost breakdown.
Frequently Asked Questions
Everything you need to know about cross-platform app development.
Explore Individual Frameworks
Dive deeper into each platform-specific or framework-specific service.
Android App Development
Native Kotlin & Jetpack Compose for 3.9B Android users.
iOS App Development
Native Swift & SwiftUI following Apple HIG for premium UX.
Flutter App Development
Dart & Impeller engine for 6 platforms from one codebase.
React Native Development
TypeScript + JSI New Architecture with OTA update capability.