How to Use Compose Multiplatform in 2025 (With Examples) [2025]

Overview

Compose Multiplatform enables declarative UI building with Kotlin, sharing code across Android, iOS, desktop, and web. 🚀

Supports four platforms - Android, iOS, Desktop, Web. Ideal for cross-platform apps in 2025 with Jetpack Compose syntax.

Platform Support Table

Platform	Usage Examples
Android	Mobile apps with native performance, Material 3 integration.
iOS	Native UIKit integration, stable since May 2025.
Desktop	JVM-based apps for Windows, macOS, Linux.
Web	Wasm-based, browser UIs with Canvas rendering.

Version Compatibility & Dependencies

Requires Kotlin 2.0+, Compose Multiplatform 1.7.0+. Add to build.gradle.kts:

plugins {
    kotlin("multiplatform")
    id("org.jetbrains.compose")
}

kotlin {
    androidTarget()
    iosTarget()
    jvm("desktop")
    wasmJs()
}

dependencies {
    commonMainImplementation(compose.runtime)
    commonMainImplementation(compose.ui)
    commonMainImplementation(compose.foundation)
    commonMainImplementation(compose.material3)
}
        

Use JetBrains Compose Multiplatform. Refer to official docs for details.

Creating Compose Multiplatform Apps

Basic Shared UI Example

Shared Composable for a simple button.

import androidx.compose.material3.Button
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable

@Composable
fun HelloButton(onClick: () -> Unit) {
    Button(onClick = onClick) {
        Text("Hello Multiplatform! 🚀")
    }
}
        

Result: A button rendering on all platforms.

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Cross-Platform List Example

LazyColumn for lists.

import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable

@Composable
fun ItemList(items: List) {
    LazyColumn {
        items(items) { item ->
            Text(item)
        }
    }
}
        

Result: Scrollable list on Android/iOS/Desktop/Web.

Beginner-Friendly Guide: How to Extract, Import, and Run Your KMP Template Project

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Template Video Tutorials

• ✅ Kotlin Multiplatform 2025: Watch
• ✅ Custom Snackbar: Watch

• ✅ Date Picker: Watch

• ✅ Bottom Sheet UI: Watch

• ✅ Dropdown UI: Watch

• ✅ Animated Warning Dialog: Watch

• ✅ Responsive Empty State: Watch

• ✅ Time Picker: Watch

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Key Points for Implementation

• Shared Code: Write UI once in commonMain.
• Platform-Specific: Use expect/actual for native APIs.
• Material3: Consistent theming across platforms.
• Accessibility: Built-in semantics support.
• Pros/Cons Table:

Ranking	Pros	Cons
1	Code reuse up to 95% ✅	Learning curve for multi-target setup
2	Native performance	Web/Wasm experimental

Theming in Compose Multiplatform

Use MaterialTheme for cross-platform consistency.

import androidx.compose.material3.MaterialTheme
import androidx.compose.runtime.Composable

@Composable
fun AppTheme(content: @Composable () -> Unit) {
    MaterialTheme {
        content()
    }
}
        

FAQ

What is Compose Multiplatform?

Declarative UI framework for multiplatform Kotlin apps.

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Which platforms are supported?

Android, iOS, Desktop, Web.

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How to make it accessible?

Use semantics modifiers.

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Can I customize themes?

Yes, via MaterialTheme overrides.

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Minimum requirements?

Kotlin 2.0, Android SDK 21+.