Cross-platform app development for iPhone and Android
Our cross-platform app development services take your app to the App Store and Google Play from one codebase. We design and build Flutter and React Native apps that feel at home on every phone, publish them under your name and keep them current, so you maintain one app instead of two.
What cross-platform app development services include
Cross-platform app development means writing one app in Flutter or React Native and releasing it on both iPhone and Android. The screens, the business logic and the connection to your backend are shared. The few parts that must differ, like payments, permissions and notifications, are handled for each platform, so customers can’t tell the app apart from a native one.
We choose the framework for each product, not out of habit. Flutter suits apps with a custom design and smooth animation. React Native suits teams that already work in JavaScript or want to share code with a React website. When an app leans heavily on device hardware, such as Bluetooth equipment or advanced camera work, we tell you plainly if native iOS and Android code is the better route.
Signs a cross-platform app fits
- You need iPhone and Android at launch
- Your budget covers one app team for both platforms
- Most screens are bookings, orders, forms or content
- You want one release schedule for both stores
- Your iOS and Android apps have drifted apart
What’s included in our cross-platform app development services
One codebase, two stores, and the work around it that keeps the app healthy.
Flutter or React Native choice
A written recommendation based on your features, design and team, made before any code is written.
UX and UI design
Screens designed once and adapted to iPhone and Android conventions, tested with users as a clickable prototype.
Shared app development
One Flutter or React Native codebase for both platforms, with native modules only where a feature needs them.
Backend and APIs
Accounts, data, payments and connections to your CRM or booking system, built and hosted securely.
Testing on real devices
Automated tests plus builds on TestFlight and Google Play testing tracks, checked across phones and screen sizes.
Launch on both stores
Store listings, screenshots, privacy details and review submission for the App Store and Google Play.
Cross-platform app development in depth
Three decisions that shape how a cross-platform app performs and what it costs to keep.
Flutter or React Native
Flutter draws its own interface, so a custom design looks the same on every phone and animation stays smooth. React Native builds on each platform’s own components with JavaScript, which suits teams with web developers and apps that share logic with a React website. Both are mature and widely used by large companies. We compare them against your features, your design and the people who will maintain the app, then put the recommendation in writing with the reasons.
Where native code still matters
A shared codebase covers most screens, but some features need platform code: in-app purchases, Apple Pay and Google Pay, background location, Bluetooth devices, home screen widgets and some camera work. We plan these in discovery, write small native modules where they are needed and test them on both platforms, so nothing surprises you late in the project or in store review.
One app, two store reviews
Apple and Google review apps differently and change their rules every year. We prepare privacy details, permission messages and screenshots for each store, release to both on the same day where we can, and keep the Flutter or React Native version current, so the app keeps working as iOS and Android move on.
How our cross-platform app development works
Discovery to launch in clear phases, with a progress update every week and a test build you can install on your own phone.
- Step 01
Discovery
Users, features and the first version agreed, with a framework recommendation, a scope and a price.
- Step 02
Design
Screens and a clickable prototype for iPhone and Android, tested with real users.
- Step 03
Build and test
Development in short cycles, with TestFlight and Google Play test builds for you to try.
- Step 04
Launch and grow
Submission to both stores, launch support and updates based on usage data.
Why Griffon for cross-platform app development
One team designs the app, builds the backend, launches it on both stores and markets it. We also publish and support apps of our own on iPhone and Android, so our plans cover the months after launch.
The app lives in your Apple Developer and Google Play accounts. Once the work is paid in full, the code, designs and store listings are yours, and any experienced developer can pick up a Flutter or React Native codebase.
Part of our Mobile app development ↗2 hours
our usual reply to a new inquiry, one business day at most
Weekly
progress updates, plus a monthly report with the data and the work done
One team
strategy, design, development and marketing under one roof
You own it
the design, code and accounts are yours once the work is paid in full
Questions about cross-platform app development, answered
What is cross-platform app development?
Building one app, usually in Flutter or React Native, that runs on both iPhone and Android. Most of the code is shared, so the app launches on both stores together and costs less to maintain than two separate apps.
Should we choose Flutter or React Native?
Flutter suits custom designs and animation-rich apps. React Native suits teams that already use JavaScript or want to share code with a React website. We recommend one after discovery, in writing, with the reasons.
Will a cross-platform app feel native?
Yes, when it is built well. We follow iPhone and Android conventions for navigation, gestures and system dialogs, and use native modules for features like payments, notifications and location.
Is cross-platform cheaper than two native apps?
Usually, because most of the design, code and testing is shared. The saving depends on how many platform-specific features the app needs. We scope and price each phase before it starts.
Who owns the app and the code?
You do. The app is published in your Apple Developer and Google Play accounts, and the code is yours once the work is paid in full.
Get a free app proposal
A 30-minute call. No deck, no pressure. Bring the site, the numbers and the goal, and leave with a plan and a price.