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In this episode, Donn and Kaushik talk to an old friend of the show, Colin White, about Treehouse, a combination of the Redwood and Zipline libraries.

Colin is a Staff Engineer at Cash App (Block).

Redwood is a multiplatform Compose library that allows you to target multiple UI toolkits on various native platforms. Ultimately this allows you to share presentation logic.

Zipline is a multiplatform JavaScript engine for Android, iOS, and the JVM, which uses Kotlin for calls in/out of the JavaScript land. This allows you to update the application logic of your apps without the traditional song and dance of the app store approval and release process.

Treehouse is the combination of both libraries, Redwood and Zipline. Listen in to learn more …

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In this episode, Donn talks with Mitch Tabian about Kotlin Multiplatform Mobile, also known as KMM.

Mitch explains what KMM is, why he decided to use it, and how it works from a developer’s perspective. The goal was to build an app and develop both the iOS and Android versions. Mitch talks about his experience in building a KMM app. We cover the pros and cons, what worked vs what did not, and his advice on using KMM going forward. Mitch also shares content about how to build native components in Jetpack Compose and SwiftUI as well as architectures used in his KMM project.

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Kaushik decides to hit record on a skype call he has with friend of the show Jesse Wilson. They start off by discussing building features across different platforms today. Jesse talks about a clever mechanism of using javascript to change logic on the fly across the Square cash app, that’s worked out pretty well. They then go on to discussing how one can try and converge across platforms in terms of business logic, architecture, naming etc. They then wind it down by discussing the state of Flutter, Kotlin multiplatform and reaching the promised land.

Enjoy.