One codebase for iOS and Android, or two native apps? We compare Flutter and native development on speed, budget and capabilities, and explain when each approach pays off.
When a company orders a mobile app, the first question is usually Flutter or native development: one cross-platform codebase, or two separate apps for iOS and Android. The right answer depends on your goals, budget and timeline. Here is how to tell which one fits.
Native Development: Swift and Kotlin
A native app is written separately for each platform, in Swift for iOS and Kotlin for Android. It talks to system APIs directly, so it gets maximum performance and access to every operating system feature.
Pros of Native Development
- maximum performance and smooth animation;
- access to new platform APIs as soon as they ship;
- a UI that fully follows Apple and Google guidelines.
Cons of Native Development
- two separate codebases and usually two teams;
- roughly twice the time and money;
- keeping features identical on both platforms is harder.
Flutter: One Codebase for iOS and Android
Flutter is Google's framework built on the Dart language. One codebase compiles into native apps for iOS and Android. Flutter's own engine draws the UI, so the app looks the same on every device.
Pros of Flutter
- one codebase instead of two, so development is faster and maintenance is cheaper;
- hot reload speeds up UI work;
- the same design on both platforms;
- a fix is made once and reaches both apps at the same time.
Cons of Flutter
- slightly larger app size;
- rare system APIs have to be reached through extra plugins;
- performance is a little below native, though for most tasks you will not notice.
When to Choose Flutter
- MVPs and hypothesis testing, when you need to launch quickly on both platforms. We wrote about choosing technology for a launch in "How to Choose a Tech Stack for Your MVP".
- Business apps: CRM clients, catalogues, delivery, appointment booking.
- Limited budget and tight deadlines.
- Content apps and services without heavy graphics.
When to Choose Native Development
- Games and apps with heavy 3D graphics.
- Fintech and projects with strict security and performance requirements.
- Apps that depend on platform features such as AR, Health, widgets and complex background processes.
- Cases where the UI must follow platform guidelines 100%.
Budget and Timeline: Flutter vs Native
Compared with two native apps, Flutter cuts the development budget by roughly 1.5-2x, and the savings on maintenance are bigger still. For startups and most business apps that is usually reason enough to pick Flutter. If the app is part of a larger system with a website and CRM, estimate the whole project together. We explain what drives development cost in "Website Development Cost: What Drives the Price".
Frequently Asked Questions
Can I start with Flutter and move to native later?
Yes. Many companies release the first version in Flutter, check demand, and then rewrite natively only the parts that really need maximum performance.
Are Flutter apps accepted in the App Store and Google Play?
Yes. Flutter builds full native apps, and they are published in the stores under the same rules as apps written in Swift or Kotlin.
How long does it take to build a Flutter app?
An MVP with core features usually takes 6-10 weeks. The timeline depends on the number of screens and on integrations with the backend, payment systems and CRM.
Is Flutter suitable for an app with online payments?
Yes. There are ready-made payment integrations for Flutter, and connecting a specific payment provider is usually no harder than in a native app.
Conclusion
Choose native development when you need maximum performance and platform features. Flutter suits fast launches, business apps and projects with a limited budget. We advise most clients to start with Flutter and go native only where it is justified. Tell us about your project and we will suggest the option that fits.
