Exploring Kotlin Multiplatform (KMP) as an iOS Developer 🚀

While exploring different approaches to cross-platform development, I recently came across Kotlin Multiplatform (KMP).

At first, I assumed it was another "write once, run everywhere" framework.

The more I learned, the more I realized that's not what KMP is trying to be.

Instead of sharing everything, KMP focuses on sharing the parts that are often duplicated across platforms:

✅ Business Logic

✅ Networking

✅ Data Layer

✅ Domain Models

while still allowing teams to build native user interfaces using:

🍎 SwiftUI on iOS

🤖 Jetpack Compose (or Views) on Android

A simplified architecture looks like this:

┌─────────────────────┐
│   Shared Module     │
├─────────────────────┤
│ Business Logic      │
│ Networking (Ktor)   │
│ Data Layer          │
│ Domain Models       │
└──────────┬──────────┘
           │
     ┌─────┴─────┐
     │           │
┌────▼────┐ ┌────▼────┐
│   iOS   │ │ Android │
│ SwiftUI │ │ Compose │
└─────────┘ └─────────┘

What I find interesting is that KMP doesn't force you to abandon native development.

Instead, it tries to solve a very specific problem:

Why maintain the same business rules, networking code, and data models in two different codebases?

Some areas I'm currently exploring:

• Project structure and source sets

• Shared vs platform-specific code

• Ktor for networking

• Dependency Injection

• Compose Multiplatform

• Interoperability between Swift and Kotlin

• Real-world production use cases

For developers already using KMP in production:

• What has been the biggest advantage?
• What challenges did you face during adoption?
• Any lessons you'd share with someone getting started?

Looking forward to learning from the community and sharing my findings as I continue exploring KMP.

KotlinMultiplatform #KMP #Kotlin #iOS #SwiftUI #Android #JetpackCompose #MobileDevelopment #SoftwareArchitecture #CrossPlatform