Since May 2019, Google officially supports Kotlin for mobile app development on Android . But, Flutter is an open-source mobile application development framework created by Google itself! Both Kotlin and Flutter have a ‘Google tag’ attached with them.
Read moreShould I use Flutter or Kotlin?
Both Google’s framework, Kotlin, and Flutter are reliable that aim to reduce development time and cost to mark its presence on Android and iOS platforms. On one hand, Flutter is more popular than a new-fangled Kotlin. On the other hand, Kotlin is preferred to build Android applications .
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