A Kotlin Multiplatform Mobile (KMM) SDK allows developers to write code once for multiple platforms, including Android and iOS. KMM projects consist of an Android project, an iOS project, and a shared module that contains the reusable code. The shared module can be imported as a standard dependency on Android and as a framework on iOS. KMM projects use the Gradle build tool and rely on Bitrise's project scanner to configure workflows and environment variables automatically. However, testing and deploying KMM projects requires manual configuration of steps, particularly when using CocoaPods or porting iOS libraries. With proper configuration and combination of standard Bitrise Steps, developers can overcome these challenges and successfully build and deploy their KMM apps.