Neither wins outright. The honest comparison runs through rendering control, native ecosystem maturity for the specific integrations a product needs, the team’s existing expertise, SDK availability for niche payment or identity providers, and whether an existing codebase already favors one framework. Flutter tends to win on rendering consistency and custom UI; React Native can win when a team already has deep JavaScript expertise or heavy existing investment in that ecosystem. Kindgeek’s broader guide to Flutter mobile app development walks through this comparison in more depth, including cost ranges and a full decision matrix.