What’s the Right Choice for Your Kotlin Multiplatform Project: SKIE or Swift Export?

Kotlin Multiplatform has long had a challenge when it comes to Swift interoperability. Kotlin/Native relies on an Objective-C interface, which can make working with features like Flow, suspend functions, enums, and sealed classes more complicated for iOS developers. SKIE has helped teams work around these limitations for years. Now, JetBrains is developing Swift Export as a different approach. In this video, I compare how both solutions work, using a banking app with real-time transaction updates as a practical example. We'll look at: Why Kotlin/Swift interoperability can be complicated How SKIE simplifies working with Kotlin Flow in Swift What happens during the SKIE build process How Swift Export approaches interoperability differently Which solution I'd choose for a production KMP project, and why I'll also explain why the maturity of a technology matters when choosing an approach for a real client project. --- 00:00 Intro 01:09 Why Kotlin/Swift interoperability is challenging 02:06 What is SKIE? 02:39 Banking app example: Working with Kotlin StateFlow 03:05 Handling Flow updates without SKIE 04:03 Working with Flow using SKIE 04:28 How SKIE works behind the scenes 05:34 How Swift Export works 06:40 Swift Export in practice: The banking app example 07:43 SKIE vs Swift Export: Which would I choose? 08:45 Outro --- Follow Aleksa on LinkedIn: Aleksa Simic -   / aleksa-simic-10bba5182   Stay connected with us: Web → https://www.aetherius-solutions.com LinkedIn →   / aetherius-solutions   Instagram →   / aetherius_solutions   X (Twitter) → https://x.com/AetheriusTech Reddit →   / aetherius_tech   --- Aetherius is a mobile development company powered by a team of experienced engineers with more than 75 successfully delivered projects in different industries. Whether you need native apps for iOS/Android or cross-platform apps written in Kotlin Multiplatform (KMP), Compose Multiplatform (CMP), Flutter, or React Native, our developers deliver them with stability. We offer flexible collaboration models: team augmentation, outsourced team, part-time support, and sprint-based. So, when you need trusted developers to jump into a project, you can always reach out to us!