Cross-Platform App Development: One Codebase, iOS and Android
Launch on iPhone and Android at the same time, with one team and one codebase. Growth Dash builds cross-platform apps in Flutter and React Native that feel native, ship faster and cost less to maintain.
What cross-platform development means
Traditionally, building for both iPhone and Android meant two separate apps in two languages by two teams. Cross-platform frameworks let developers write most of the app once and run it on both systems. Modern frameworks, notably Flutter from Google and React Native from Meta, produce apps that look and perform close to native for the great majority of business use cases. The practical result is a shorter time to market, a smaller budget and one product roadmap instead of two to keep in sync.
When cross-platform is the right choice
- You need both platforms at launch and want consistent features and design everywhere.
- Your app is content-, commerce-, booking- or workflow-driven rather than relying on extreme graphics or highly specialised device features.
- You have a limited budget or tight timeline and want to prove the idea quickly.
- You want to keep maintenance simple, with one codebase to update and test.
When native is the better choice
We tell clients honestly when cross-platform is not the best fit. Apps that depend on heavy 3D graphics, cutting-edge platform features that frameworks do not yet support, or very specific hardware integration may be better built natively on iOS or Android. If you are unsure, our discovery phase includes a technical assessment that compares options against your actual requirements.
Flutter or React Native?
Flutter
Flutter draws its own interface using a fast rendering engine, which gives very consistent visuals across devices and smooth animations. It uses the Dart language and is excellent for design-heavy apps and for teams that want identical behaviour on every platform. It also extends to web and desktop from the same code.
React Native
React Native uses JavaScript or TypeScript and renders native components, which suits teams that already work with React on the web and want to share logic and developer skills. It has a large ecosystem of libraries and a big talent pool.
Both are mature, widely used and backed by large companies. We recommend one after understanding your team, product and roadmap, and we do not push a framework simply because it is our favourite.
How we make cross-platform apps feel native
The most common complaint about cross-platform apps is that they feel generic. We avoid that by respecting each platform’s conventions for navigation, gestures, typography and system dialogs, by using native modules where they matter, and by testing on real devices rather than only simulators. Performance work, including optimised lists, image handling, caching and start-up time, is part of every project.
What we build
- Ecommerce and loyalty apps with payments, wishlists and push notifications
- Booking and on-demand service apps with maps, scheduling and live status
- Fintech and wellness apps with secure authentication and dashboards
- Learning and community apps with content, progress tracking and chat
- Internal tools for field teams, sales and operations, connected to your CRM and back-office systems
Our process
- Discovery and technical assessment to choose the framework and define the first release.
- UX and UI design using a shared design system that works on both platforms.
- Development in sprints with builds delivered to you through TestFlight and Google Play internal testing.
- Backend and API work built alongside the app. See API development.
- Testing on a range of iPhones, iPads and Android devices, with automated tests for core flows.
- Launch on the App Store and Google Play, followed by monitoring and iteration.
Cost and maintenance
Because most of the code is shared, cross-platform projects are usually more economical than building two native apps, and updates only need to be made once. You should still budget for ongoing work, since both Apple and Google change their requirements every year and frameworks release updates. Our maintenance plans keep your app compatible and secure, and our app store optimisation work helps people find it.
Security, privacy and ownership
We apply secure authentication, encrypted storage and transport, careful permission requests and dependency reviews. We build with privacy rules such as GDPR, the UK GDPR, CCPA and India’s data protection law in mind and recommend legal review of your policies. You own the source code, designs and store accounts at all times.
Cross-Platform Development FAQs
For most business apps, yes. Modern frameworks deliver smooth performance and a native feel. For graphics-intensive apps or very specialised device features, native development can still be better.
Savings depend on the project, but sharing most of the code between platforms generally reduces both build and maintenance effort compared with two separate native apps.
Both are excellent. We recommend based on your design needs, existing team skills and roadmap, and explain the trade-offs during discovery.
Yes. Camera, location, notifications, biometrics and payments are all well supported, and native modules can be added when a feature needs it.
Yes. Many products start cross-platform to validate the idea and later rebuild specific parts, or the whole app, natively as requirements grow.