Choosing between native and cross-platform development decides more than the budget for your first version: it also sets what the app will cost to maintain for years. Getting it wrong is expensive, because rewriting an app from scratch is almost a new project. Here is how the two approaches differ, with simple rules for choosing.
In short
- A native app is written separately for iOS and Android, while a cross-platform app runs on both from one shared codebase.
- Native gives you the most performance and device access, and cross-platform a smaller budget and a faster launch on two platforms.
- For simple cases there is a third route: a progressive web app (PWA) that opens in the browser and installs on the home screen.
What "native" and "cross-platform" mean
A native app is written in the platform's own language and tools. For iOS, that's the Swift language and Apple's SwiftUI interface framework; for Android, it's the Kotlin language and Google's Jetpack Compose. You get two separate apps with two codebases, each fully at home on its platform.
A cross-platform app is written once and runs on both platforms. The best-known tools are Google's Flutter, where code is written in Dart and the framework draws the interface with its own rendering engine, and Meta's React Native, where JavaScript or TypeScript code drives the platform's native interface elements.
Kotlin Multiplatform from JetBrains sits in between. The business logic is shared, while the interface can stay native on each platform or be shared too, using Compose Multiplatform.
Performance and access to device features
For most business apps, such as catalogues, forms, customer accounts and bookings, modern cross-platform frameworks are fast enough that users won't notice. The gap appears when an app works hard with graphics, complex animation, augmented reality (AR) or real-time audio and video processing. There, native code gives you more control and more predictable results.
Device features follow a similar pattern. Camera, location, notifications and payments have long been available in cross-platform frameworks through ready-made modules (plugins). But new iOS and Android features appear in the native tools first, the matching modules arrive later, and they are often maintained by third-party developers.
Some things have to be written natively even in a cross-platform project, such as home screen widgets or a smartwatch app. If features like these are the heart of your product, that's a strong argument for going native.
Look and feel, budget and long-term maintenance
iOS and Android users are used to different behaviour: navigation, gestures, and the look of switches and menus. Native interface elements follow these habits automatically. Cross-platform frameworks imitate them or offer one shared design, which for a product with a strong brand can even be a plus.
Budget is the main reason to choose cross-platform. One codebase means one development team and less work on the logic. But the saving isn't half: design for both platforms, testing on different devices and publishing to the App Store and Google Play still have to be done for each platform.
Over the long run, maintenance matters too. New versions of iOS and Android come out every year, and the app has to keep up. With native, you depend only on Apple and Google; with cross-platform, you also depend on the framework and third-party modules. Think about the team as well: who you will be able to hire and keep in two or three years' time.
How to choose: simple rules
- Native development. Choose it if the app is the product itself, if speed and smoothness are critical, or if you rely heavily on the camera, Bluetooth, augmented reality, widgets or a smartwatch.
- Cross-platform development. Choose it if the features are the same on both platforms, the product is built around content, forms and orders, and budget and timelines are tight.
- Kotlin Multiplatform. Consider it if you need a native interface but don't want to write complex business logic twice.
- One platform to start. Begin with iOS or Android if you are testing an idea and most of your audience uses one of them.
If you're unsure, picture the product in two years. If complex device features are in the plans, build native. If the priority is to test demand quickly and grow the same features on both platforms, cross-platform usually makes more sense.
A progressive web app as a third route
A progressive web app (PWA) is a website that behaves like an app: it can be added to the home screen, opens without the browser's address bar and can partly work offline. You maintain one codebase for the web, iOS and Android, and updates reach users immediately, with no app store review.
The limits are real, though. Access to device features is narrower, especially on iOS, where push notifications work only with restrictions, and without the App Store and Google Play your app is harder to find. That makes a PWA a good fit for simple cases: a catalogue, appointment booking, an internal tool for your team or a first test of an idea.
Checklist
- List the features without which the app makes no sense.
- Mark the ones that need deep access to the device.
- Find out which platforms most of your audience uses.
- Budget not just for the launch but for two or three years of maintenance.
- Check whether you could start with a PWA or a single platform.
- Agree on the technology with your team before design begins.
How we do it at IANKO
We choose the technology at the "find the purpose" stage, before the first mock-up. Our Business Analyst goes through the features and audience with you, and our Chief Technology Officer (CTO) assesses them for performance, device access and long-term maintenance. Our Web & Mobile App Designer works with the habits of each platform's users, and our QA engineers and testers check the app on iOS and Android before it is published to the App Store and Google Play. An iOS app starts from $12,000 and an Android app from $9,000.
The bottom line
Native development gives you the full power of the platform, cross-platform saves time and budget across two platforms, and a PWA is the simplest start. The right choice depends on your features, your audience and your plans for the next few years, not on which framework is in fashion. Start by listing the features that really matter, and the answer becomes much clearer.