Compare the real constraints
Compare the team's ability to build the required interface, the quality of needed libraries, integration with Android and iOS code, and the upgrade and testing path. An existing team's experience can matter more than an abstract benchmark.
- Camera, maps, notification, and background capabilities.
- RTL/LTR behavior and accessibility.
- Third-party dependency health and update plans.
When Flutter may fit
A product seeking a consistent visual interface across both platforms and a team comfortable with Dart and Flutter may benefit. Shared code does not remove platform-specific testing or occasional native integration.
When React Native may fit
A React/TypeScript team may benefit from familiar component practices. Do not assume a web library transfers to mobile; verify native dependencies and the product's critical functions.
Make the choice reversible
Prototype the riskiest integration and test on real devices, then document the decision and upgrade costs. If the product needs deep platform features, compare both options with native development too.