The all-in-one app is finally practical
Sound familiar?
Your field team uses Android phones, head office uses Windows laptops, and management wants it on their iPads and Macs. Three separate apps would triple the cost and the bugs.
In 2026, building one app for phones, tablets and computers is realistic for most business software. The three leading options have all invested heavily in desktop this year. Canonical, the company behind Ubuntu, became lead maintainer for Flutter on desktop. Microsoft maintains React Native for Windows and macOS. JetBrains lists Compose Multiplatform as stable on Android, iOS and desktop.
At the same time, the line between phone and computer is blurring. Android 17 made every app resizable on large screens and added desktop-style windowing, and Google says over 580 million large-screen Android devices are in use.
What each framework supports
| Platform | Flutter | React Native | Compose Multiplatform |
|---|---|---|---|
| iOS and Android | Yes | Yes | Stable |
| Windows | Yes | Yes, via Microsoft's React Native for Windows (Windows 10 and later) | Stable (desktop JVM) |
| macOS | Yes | Yes, via Microsoft's React Native for macOS | Stable (desktop JVM) |
| Linux | Yes | No official support | Stable (desktop JVM) |
| Web | Yes; WebAssembly planned as the default in 2026 | Not part of the core project | Beta (Kotlin/Wasm) |
| Language | Dart | JavaScript / TypeScript | Kotlin |
Flutter's multi-window support is still experimental: version 3.47 added popup windows on Windows and Linux. If your app depends on several windows open at once, prototype that first on whichever framework you choose.
Sources: Flutter 3.47, Flutter 2026 roadmap, React Native for Windows, Kotlin Multiplatform platform stability, Android 17.
Which one fits your app
IfYou need every platform, including Linux and the web, from one codebase
ThenFlutter has the broadest coverage from a single SDK.
IfYour team writes React and your desktop users are on Windows and Mac
ThenReact Native with Microsoft's Windows and macOS projects.
IfYou have Kotlin and Android developers, or existing Java desktop software
ThenCompose Multiplatform shares Kotlin code across Android, iOS and desktop.
IfDesktop is the main product and phones are secondary
ThenConsider a web app first, then a desktop wrapper only if you need offline or hardware access.
IfThe app is Apple-only (iPhone, iPad, Mac)
ThenNative SwiftUI covers all three. See native iOS in 2026.
For the head-to-head on mobile, see Flutter vs React Native and Kotlin Multiplatform vs Flutter.
Want to know how much of your app can be shared?
Get a free consultationDesktop is not a big phone
The most common mistake with all-in-one apps is shipping a phone layout stretched across a monitor. Desktop users work differently, and a shared codebase must allow for it.
- Layouts that adapt from one column on phones to multiple panes on large screens
- Keyboard shortcuts, right-click menus and full mouse and trackpad support
- Resizable windows, and multiple windows where the work needs them
- File system access, drag and drop, and printing where relevant
- Code signing on Windows and notarisation on macOS for direct downloads
- An update mechanism: app stores, or your own auto-updater
Plan the shared core first
Whatever the framework, the reusable part of an all-in-one app is its core: data models, business rules, API calls and offline storage. Design that core first and keep it free of screen code. Then each form factor gets the layout it deserves without duplicating logic.
If you are planning a cross-platform app, see our mobile app development services and our work with Flutter, React Native and Kotlin.
Key takeaway
One codebase can now serve phones and computers. Pick the framework by the platforms you must support and the skills you have, share the core logic, and design each form factor on its own terms.
Frequently Asked Questions
Written by
Vishvas Patel
Mobile & Desktop Engineering
