Test the difficult integration before the home screen
Choose React Native when the team's React knowledge transfers usefully and the required native integrations have a credible maintenance path. Choose Flutter when its development model fits the team and the same difficult integrations are demonstrably supportable. Neither choice should be decided by a visually polished counter application.
The deciding prototype is the feature most likely to cross into platform-specific code: a device connection, background interaction, camera workflow or specialist SDK. If that feature cannot be maintained, a shared interface codebase will not rescue the product.
Clodron's perspective is product ownership rather than framework loyalty. Existing expertise matters, but only after the difficult capability is proven.
Count what the team can actually reuse
A React web team may bring useful component thinking, language knowledge and testing habits to React Native. That does not mean an existing browser interface can be copied unchanged. A Flutter proposal likewise needs a realistic account of what the team already understands and what it must learn.
Compare the maintainers, not hypothetical hiring markets. Who will review changes, diagnose a failed release and update a platform integration after the original author leaves? A framework familiar to the delivery studio but unfamiliar to the future owner may create a costly handover.
Shared business rules and data contracts can be valuable even when interface code differs. Define reuse around tested behaviour rather than a target percentage of common files. A percentage without a denominator and maintenance context is not a decision metric.
Inspect the native escape hatch
React Native documents native modules and native components for connecting platform code to the application. Flutter documents platform channels for exchanging messages with platform-specific implementations. Both provide routes beyond the shared layer; neither makes that work disappear.
For each critical SDK, check the actual library, supported platform versions, update history and whether the product team can maintain a missing piece. A package existing in a directory is not evidence that every required behaviour works.
Ask what happens when permission is refused, the app resumes after interruption or the operating system changes the relevant API. The useful comparison is how the proposed implementation behaves and can be repaired, not whether both websites list the same capability.
Evaluate the interaction and release workload
Build the difficult screen with realistic content, input, navigation and accessibility settings. Test it on the devices the intended audience uses. Do not claim a universal performance winner from an unrelated benchmark or a simulator recording.
Also compare build signing, release ownership, crash diagnosis and compatibility with backend changes. Cross-platform development still produces platform-specific release responsibilities. Those tasks belong in the estimate, alongside the feature work.
If the product does not need a mobile framework at all, our web versus native decision guide is the earlier question. Our apps and SaaS engineering should begin with that product boundary, not assume an installed application is mandatory.
Make a maintenance decision this week
Prepare a small acceptance set for the hardest capability, including an interrupted operation and a denied permission. Implement it with the proposed libraries in each serious candidate. Have the future maintainer explain the native code boundary and make a modest change.
Choose the framework whose capability, interaction behaviour and ownership model survive that exercise. If both pass, prefer the team's demonstrated ability to maintain the product. If neither passes, reconsider the library or use platform-specific implementation where needed. A narrower honest boundary is more valuable than promising a completely shared application that nobody can operate.