How Architects Should Choose Between Native, Flutter, React Native, and KMM

Choosing Between Native, Flutter, React Native, and KMP

Choosing a mobile architecture is not mainly about finding the framework with the highest code-reuse percentage.

The real decision is about defining the sharing boundary:

• Which business rules must remain consistent?
• Which features require platform-specific control?
• Can Android and iOS releases remain synchronized?
• Who will maintain native integrations?
• Where will security-sensitive decisions be enforced?

Native provides direct platform control. Flutter commonly shares UI and application logic. React Native combines shared React logic with native rendering and modules. KMP can share domain and data layers while keeping Android and iOS interfaces native.

Before deciding, prototype the least portable production flow—such as payments, identity verification, Bluetooth, camera processing, or background work. Measure real workloads and assign clear ownership for every platform integration.

The best architecture is not the one that shares the most code. It is the one whose boundaries and ownership model the organization can maintain for years.

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