Hi! I am looking for a compression library available for KMM. Do you have anything to suggest?

Hi everyone, I am trying to upgrade our KMP project from Kotlin 1.9.25 to Kotlin 2(2.0.21 to be specific). I have updated my Android Studio to Narwhal 3 Feature Drop | 2025.1.3 and set up the gradle to use kotlin 2.0 as follows:

kotlin_language_version = 2.0
sourceSets.configureEach {
    languageSettings {
        apiVersion = kotlin_language_version
        languageVersion = kotlin_language_version
    }
}

The I have updated almost all my dependencies to their latest and the gradle sync successfully but when I build/run the project I get the error below:

> Task :common:kspStagingMyAppDebugKotlinAndroid FAILED

e: -api-version (2.0) cannot be greater than -language-version (1.9)

I can add the stack trace if needed!

This message was deleted.

Fails to build after moving to 2.2.20 from 2.2.10. https://issuetracker.google.com/issues/444595002 My YouTrack account appears not to work any more so I can't report it there.

Bug Report

iOS Compilation Failure with ModalBottomSheet Components IR lowering fails during iOS compilation with "Collection contains more than one matching element" error when using ModalBottomSheet components with complex nested composables. Android compilation works without issues.

I hava running project for Android and iOS but durinch archive IPA file i am getting issue when ia call gradlew buil a got error framework not found FirebaseCore any ideas why ?

When starting a new compose multiplatform project (Android & Desktop, maybe iOS), what's the recommendation for handling navigation? I've tried to use

org.jetbrains.androidx.navigation:navigation-compose:2.9.0-beta05

without any luck. Gemini agent went with Voyager, but the code it wrote wouldn't even compile. And I am reading that there's a new alpha Navigation 3 from Google?

Getting crashes when using DatePicker component on iOS with kotlinx datetime. I'm using Kotlin 2.2.20, CMP 1.9.0-rc02 and kotlinx.datetime 0.7.1.

Uncaught Kotlin exception: kotlin.native.internal.IrLinkageError: Can not get instance of singleton 'System': No class found for symbol 'kotlinx.datetime/Clock.System|null[0]'

More in 🧵

i have issue in this card that i want the both blue cards get the same heigh as tallest one . have you u any idea of how to do it

Are there any best practices for structuring a CMP project that will have a CMP tool window (a sidecar to Xcode) as the main focus and a few helper apps in pure Swift / SwiftUI it will have to interoperate with? My specific case is using XcodeKit, which needs a Service Extension, an Editor Extension and a small CommunitcationsBridge piece to communicate across a security boundary because Xcode, practically, has no Extension API. Mainily just Accessibility API's. I have two really good examples Swift projects that already do this as templates for the Swift structure, I just dont know if I can have some kind of shared project (or some hybrid) I can use for both. RIP App Code 🫗 Any suggestions or pointers to other projects that have both sides in one repo, would be appreciated.

Hi, Has anyone used any library to embed YouTube in compose myltiplatform ?

Hi, I have a file config.json in library/commonMain/resources folder, How can I read it from iOS? I already try but it doesn’t work

NSBundle.allBundles.filterIsInstance<NSBundle>().forEach { bundle ->

    val path = bundle.pathForResource("config", "json")

    if (path != null) {
        return NSString.stringWithContentsOfFile(
			path = path,
			encoding = NSUTF8StringEncoding,
			error = null
        ) as String? ?: throw IllegalStateException("Failed to read file")
    }
}

It seems that the file wasn’t copied into iOS bundle. I’m not using https://www.jetbrains.com/help/kotlin-multiplatform-dev/compose-multiplatform-resources.html because I don’t use Compose Multiplatform in the app Please help

Hi, I'm trying to use io.mockative.Mockable and it is supplying the @Mockable annotation. However, in my tests, I can't get these to be found:

import io.mockative.mock
import io.mockative.of

I have tried everything that ChatGPT suggests... My build.gradle.kts:

plugins {
    kotlin("jvm") version "2.2.0"
    id("com.google.devtools.ksp") version "2.2.0-2.0.2" // KSP for Kotlin 2.2.0
    id("io.mockative") version "3.0.1"
}

group = "io.isgi"
version = "1.0-SNAPSHOT"

dependencies {
    implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.6.1")
    implementation("io.mockative:mockative:3.0.1")
    kspTest("io.mockative:mockative-processor:3.0.1")

    testImplementation(kotlin("test"))          // kotlin.test API
    testImplementation(kotlin("test-junit5"))   // engine binding
}

tasks.test { useJUnitPlatform() }
kotlin { jvmToolchain(21) }

My gradle.properties:

kotlin.code.style=official

#KSP
ksp.useKSP2=true

My setting.gradle.kts:

rootProject.name = "kotlinNativeUtilsLib"

pluginManagement {
    repositories {
        gradlePluginPortal()
        google()        // <-- needed so Gradle can find AGP for the Mockative plugin
        mavenCentral()
    }
}

plugins {
    id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
}

dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        google()
        mavenCentral()
    }
}

Anybody see the problem or can share a repo? Thx, George

Anybody tried mac os 26 with KMP? Is it working fine for all the tooling? want to upgrade but not sure if the tooling will be fine as well

Hi, i am trying to use dropShadow in compose multiplatform. But the Shadow is inaccessible from commonMain, says it is private. Do i need to use specific cmp version ? Thanks

Hi. Created the compose multiplatform project in Android Studio Narwhal 3 Feature Drop | 2025.1.3. The created project runs on Android and JVM, on iOS build ends with error "No such module 'ComposeApp'". Intel macOS 15.5, xCode 16.4 What could have gone wrong? Logs from xCode in a file

Hello Everyone, My name is Ravi Sinha.. I recently migrated my product to cmp with kmp. i am seeing one issue in firebase crashes for ios.. Not able to get readable crash logs.. does anyone hlep me get logs property like Android using cmp/kmp

I can't access the StoreKit2 API in the shared module. "import platform.StoreKit" in iosMain only offers me the original StoreKit objects. I've cleaned caches very aggressively and got the latest versions of everything. It does seem to work in the ios module (outside shared), Can they be accessible in shared/iosMain?

is there a doc to show what we can do and the limit of the new "web" target from the 2.2.20 ?

Hi! Anyone has some suggestions on Kottie vs. Compottie? I like that Kottie keeps it simple by not having its own rendering engine, but it has less stars on GitHub (so maybe fewer users?) and less activity recently. Thank you 🙂

Hello Everyone's does anyone face any issue with ios firebase crash logs using multi platform

Hi everyone, I have a KMM project with two modules:

shared

and

payment

. I want to publish only the

shared

module as a Maven artifact and have the

payments

module included inside it so that when my consumer adds the

shared

dependency,

payments

is available too. Currently,

shared

depends on

payments

via

implementation(project(":shared:payments"))

in

commonMain

. When I publish just

shared

and use it in my consumer app, I get errors like:

Could not find ProjectName.shared:payments:unspecified.

is there a way to package

payments

inside

shared

, so only one artifact needs to be published?

Hi there, facing the issue below with the XCode 26 Error Summary Environment: - Kotlin: 2.2.0 - CMP: 1.10.0-alpha01 - Xcode: 26.0 (Build 17A324) - iOS SDK: iPhoneOS26.0.sdk Main Error:

Exception in thread "main" java.lang.Error:
  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.0.sdk/usr/in
  clude/DarwinFoundation1.modulemap:288:8:
  error: module '_c_standard_library_obsolete' requires feature
  'found_incompatible_headers__check_search_paths'

Cascade Failures:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.0.sdk/System
  /Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:23:10:
  fatal error: could not build module '_Builtin_float'

  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.0.sdk/System
  /Library/Frameworks/Foundation.framework/Headers/Foundation.h:6:10:
  fatal error: could not build module 'CoreFoundation'

Stack Location:

at org.jetbrains.kotlin.native.interop.indexer.ModuleSupportKt.getModulesASTFiles(ModuleSupport.kt:80)
  at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.buildNativeLibrary(main.kt:567)
  at org.jetbrains.kotlin.native.interop.gen.jvm.Interop.interop(main.kt:101)

This appears to be a Kotlin Native incompatibility with the beta iOS SDK 26.0, Any guidance will be appreciated!

Hi everyone I am trying to use Crashlytics for iOS in a multiplatform project. I added the dependency via SPM and added the gitlive-firebase-sdk. This works fine when building the app via Xcode, but when trying to run tests, it fails to link the framework. I tried to use the workaround described in the readme of the gitlive-firebase-sdk that suggests using cocoapods for this, but this is a pain and the setup leads to countless other issues. Is there an easy way of fixing this? I tried using spm4kmp plugin, but linking for tests doesn‘t work.

My opinion: With iOS 26 and Liquid Glass 💧 , Apple has helped KMP a lot. Why? How i see it, Compose Multiplatform is good for many use cases, B2B, etc. But if you want a truly native UI, you need SwiftUI from now on, since no custom shader, Flutter effect or Compose modifier can bring Liquid Glass UX as Apple native has it. It’s just too good. So for Consumer apps KMP + Swift UI will be the way to go (consume VM from Swift). Flutter is not setup for this. React Native has the bridge inefficiencies Only KMP offers native performance and the ability to use Swift Ui easily. Future looking bright here 💪🏽

Hello 👋, I’ve recently been exploring the new Swift Export feature and created a small sample module with a foo class and a bar function. While reviewing the generated Swift Export code, I noticed that it seems to be essentially the Objective-C output wrapped with Swift code. Could you clarify if that’s actually the case, or if Kotlin code is being directly converted into Swift syntax? I also have a couple of related questions: 1. Do you have an estimated timeline for when this feature will become stable? At the moment, configuration feels quite complex, and from what I’ve read, each opt module needs to be exported separately. 2. In my sample, the module contains Compose code, and I encountered errors regarding mismatched input names (along with a few other related issues). Thanks in advance for your clarification and guidance!

Hello I was looking for multi module approach and I have a doubt that as there as a plugin called androidlibrary which also created the module and now we have multiplatform.library this too creates a module can you clarify once please? are there any tradeoff or are they just a new convention.

👋 Hello, team!

I've seen a lot of improvements on the Kotlin-Swift interop recently. What would be the easiest way to call the Koog Agentic Framework from a Swift/Linux (so basically Swift on server) based application?

Hey friends! This is a silly question, so apologies in advance. 😅 I have some tests in

commonTest

. Recently, I noticed that I inadvertedly used JVM-specific code in one of those tests (namely,

File

and

readText()

. Although the tests run without any issues, I think I should move them to

jvmTest

instead because it uses non-common code. Is this the correct way to go, or should I keep this scenario as-is? Thanks!