Would it be better to use Kotlin or Swift for an app?

Answer 1

If you want to build an app solely for Android...then Kotlin is your weapon,for IOS use swift or objective C but you can use Kotlin/Native to make apps that run on iOS...Swift is well documented and there are alot resources for it compared to Kotlin. If you are targeting both Operating systems then you can use Kotlin since you can share common Kotlin code between many platforms, including Android, iOS, server-side, JVM, client-side, JavaScript, CSS, and native.

Answer 2

It depends on which systems you have access to as Swift is best on Mac and Kotlin on PC. You can make Android apps with Swift and iOS apps with Kotlin though the reverse is better supported. The issue is, without two custom support libraries, the same base code can't be used on both platforms. Therefore, it doesn't make sense to use either for a single app to run on both. Web based code can be packaged into apps on both.