Cross-platform mobile development: Flutter, React Native or Kotlin Multiplatform in 2026

The cross-platform market in 2026Cross-platform mobile development now accounts for 60% of new mobile projects. Three frameworks dominate: Flutter (Google), React Native (Meta) and Kotlin Multiplatform (JetBrains). Each has its strengths and weaknesses.Flutter: the challenger turned leaderFlutter uses the Dart language and delivers pixel-perfect rendering that is identical across all platforms. Performance is close to native thanks to AOT compilation. The package ecosystem is rich. The learning curve is moderate but requires learning Dart.React Native: the safe betReact Native capitalises on the vast JavaScript/React ecosystem. The New Architecture (Fabric + TurboModules) has solved the historical performance issues. Recruitment is made easier by the popularity of React. Integration with existing native code is excellent.Kotlin Multiplatform: the pragmatic approachKMP lets you share business logic across Android, iOS and web while keeping native interfaces. This approach delivers the best performance and the best platform integration, but requires more work than « write once, run everywhere » solutions.Source: Stack Overflow Developer Survey 2026 and JetBrains Developer Ecosystem Report 2026