Key details at a glance
Flutter delivers iOS + Android from one codebase — the default choice for most cross-platform projects in 2. React Native fits teams with existing JavaScript expertise looking to reuse that knowledge for mobile development. Swift (iOS-only) and Kotlin (Android-first native) remain the right choice for apps needing deep platform-specific integration or premium native feel. A serious partner recommends the stack based on your needs and gets your approval before writing code — typical MVP timeline is 8 weeks.