Cross-platform app development · San Diego

Cross-platform app development with React Native and Flutter

Cross-platform app development lets you ship one app to iOS and Android from a single codebase. Orcatec is a San Diego team that builds React Native and Flutter apps, shares logic with your web product and moves existing native apps onto one codebase without a risky big-bang rewrite.

  • React Native and Flutter, chosen for your team and product
  • Shared types, API clients and business rules with your web app
  • Step-by-step migration from two native apps

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Cross-platform services

React Native app development

Apps built with React Native and TypeScript, using Expo where it fits, with native modules written in Swift or Kotlin when a feature needs them.

Flutter app development

Flutter apps in Dart with a consistent custom interface on both platforms and platform channels for device features.

Code sharing with web

One monorepo for your web app and mobile app, sharing data models, validation, API calls and business logic.

Native to cross-platform migration

Move separate iOS and Android apps onto one codebase screen by screen, while both apps stay live.

Performance and stability work

Profiling slow lists and screens, cutting app start time, fixing memory leaks and reducing crash rates.

Over-the-air updates

Release JavaScript fixes without waiting for store review, within App Store and Google Play rules.

React Native and Flutter in practice

Picking the framework is only the first decision. These are the parts of the stack we set up on most projects.

React Native

  • TypeScript
  • Expo and EAS
  • React Navigation
  • TanStack Query
  • Reanimated
  • New Architecture (Fabric, TurboModules)

Flutter

  • Dart
  • Riverpod or Bloc
  • go_router
  • Platform channels
  • Flutter for web (where it fits)

Shared with web

  • Monorepo (Turborepo or Nx)
  • Shared TypeScript packages
  • OpenAPI or GraphQL clients
  • Design tokens

Quality and release

  • Jest and Detox
  • Maestro
  • Sentry crash reporting
  • Fastlane and CI pipelines

How much code can you really share?

Between iOS and Android, most of a business app is shared: screens, navigation, state, data and tests. The platform-specific part is usually small, such as push notification setup, background tasks, some device features and store configuration.

With a React web app, the gain goes further. Data models, validation rules, API clients and parts of the business logic can live in shared packages used by both web and mobile. Screens are usually built separately, because a phone and a desktop browser need different layouts. The result is fewer bugs caused by two teams interpreting the same rule in two different ways.

Case study: one codebase, two app stores

Spinning streams its indoor cycling classes to subscribers on iOS and Android from a single cross-platform app with low upkeep.

Spinning® · Fitness

Spinning: on-demand indoor cycling app for iOS and Android

Spinning, the company behind the indoor cycling program and its instructor certification, needed a way to bring its classes to members at home. We built subscription apps for iOS and Android that stream one shared library of classes.

Read the case study →
  • A very large increase in the subscriber base, as reported by the client
  • Low churn after launch
  • Very low maintenance cost

Planning a cross-platform app?

Tell us about your product and any apps you already have. We will reply within one business day with questions and a rough estimate.

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Migrating from two native apps to one codebase

A full rewrite stops feature work for months. We prefer a gradual migration when the existing apps allow it.

  1. Audit

    We review both native apps, the backend and the release process, and list the features with their real usage.

  2. Plan the order

    Simple, high-traffic screens move first; complex device features move last or stay native.

  3. Embed and replace

    New cross-platform screens run inside the existing apps, so users get updates while the migration continues.

  4. Retire the old code

    Once the shared code covers the app, the native projects shrink to a thin shell and one team maintains everything.

Why work with Orcatec on a cross-platform app

We run our own web and mobile product in production, so we care about the things that matter after launch: crash rates, update cycles, store reviews and how long a small change takes to ship on both platforms.

We are based in San Diego County, work in Pacific time and can meet in person for planning. You own the code and the store accounts from day one.

Frequently asked questions

React Native or Flutter: which should I choose?

Is cross-platform app development cheaper than native?

Can a React Native app use native device features?

Can you move our two native apps to React Native without a full rewrite?

Are you a React Native app development company in San Diego?

Will a cross-platform app pass App Store and Google Play review?

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Ready to discuss your project?

Tell us what you want to build. We’ll reply within one business day with questions and next steps.

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