Mobile
React Native vs Flutter vs Native: Which Should You Build Your App With?
Most apps do not need two separate native codebases, and a few really do. Here is how to tell which group your app belongs to.
By Prolificrew Engineering · · 3 min read
In this article
Every mobile project starts with the same question: build one app that runs on both platforms, or build two? The honest answer is that for most business apps a shared codebase is the better trade, and for a minority of apps it is the wrong one. This guide explains the three main approaches and gives you a way to decide.
The three approaches in one paragraph each
React Native lets you write the app in JavaScript or TypeScript with React. It renders real native UI components on each platform, and you can drop down to Swift, Kotlin or Objective-C for anything the framework does not cover. Flutter uses the Dart language and draws its own interface with a rendering engine, so the app looks identical on both platforms and does not depend on native UI widgets. Native development means building separately for iOS (Swift, usually with SwiftUI) and Android (Kotlin, usually with Jetpack Compose), with full access to every platform feature on day one.
Side-by-side comparison
| React Native | Flutter | Native (Swift + Kotlin) | |
|---|---|---|---|
| Language | TypeScript / JavaScript | Dart | Swift and Kotlin |
| Codebases | One (plus small native modules) | One (plus small native plugins) | Two |
| UI approach | Native components | Custom-drawn, consistent across platforms | Native components |
| Hiring pool | Very large (web developers can contribute) | Smaller, growing | Large, but two skill sets |
| New OS features | Usually after a library or module is written | After a plugin is written or updated | Available immediately |
| Web code reuse | Logic and some patterns, not UI | Limited | None |
| Cost to maintain | Lower | Lower | Highest |
Performance: does it matter for your app?
For typical business apps (forms, lists, dashboards, chat, maps) all three perform well enough that users cannot tell the difference. Performance differences show up in extreme cases: heavy real-time graphics, complex gesture-driven animation across large lists, intensive audio or video processing, or apps that must run for long periods in the background. If your core feature is in that category, prototype it in your short-listed technology before committing.
When to choose React Native
- Your team already knows React and TypeScript, or you also have a web product to share logic with.
- You want a native look and feel that follows each platform’s conventions automatically.
- You value a large hiring pool and a huge ecosystem of libraries.
- You need over-the-air updates for JavaScript changes between store releases (subject to store rules).
When to choose Flutter
- A highly branded, custom interface that should look identical on every device matters more than platform conventions.
- You are building for several targets (mobile, web, desktop) from one UI codebase.
- Your team is happy to adopt Dart, or you are starting fresh without a JavaScript codebase.
When to go fully native
- The app’s core value depends on deep platform features: advanced camera pipelines, Bluetooth accessories, health and sensor frameworks, widgets, watch or car integrations.
- You target one platform first and can afford to wait for the second.
- You have the budget and team for two dedicated codebases and want the highest ceiling on each.
Hidden costs people forget
- Native modules. Even with a shared codebase, some features need platform-specific code. Budget for it if you use Bluetooth, biometrics or background tasks.
- Upgrades. Mobile operating systems change every year. Plan time to keep dependencies current.
- Store requirements. Privacy labels, permission explanations and review guidelines apply to every approach and take real time.
- Testing on real devices. Emulators miss performance and hardware issues. Include a device test plan from the start.
How we decide
We start with a short list of the features that make the app valuable, then check each against what the candidate frameworks do natively. If every feature is available in React Native or Flutter through well-maintained libraries, we choose between them on team skills and design needs. If one or two features need custom native work, we still usually build shared and write those modules natively. We go fully native only when the product is the platform feature.
A useful test: if you can describe the app as “forms, lists, maps, payments, notifications and a camera”, a shared codebase will almost certainly serve you well.
Whichever route you take, the architecture matters more than the framework: offline behaviour, data sync, error handling and a clean separation between UI and business logic. If you want help weighing the options for your app, see our mobile app development service, or read how costs break down in our custom software cost guide.