Awesome KMM

Kotlin Multiplatform Mobile (KMM) is an SDK designed to simplify creating cross-platform mobile applications. With the help of KMM, you can share common code between iOS and Android apps and write platform-specific code only where it’s necessary. For example, to implement a native UI or when working with platform-specific APIs.

Resources

🖼 KMM website
📜 KMM blog
📺 KMM YouTube
📋 KMM Documentation
🤩 KMM Samples

Contents

Tooling

🛠 Kotlin Multiplatform Mobile plugin for Android Studio

The Kotlin Multiplatform Mobile (KMM) plugin helps you develop applications that work on both Android and iOS.

🛠 Kotlin Multiplatform Mobile plugin for AppCode

The Kotlin Multiplatform Mobile (KMM) plugin for AppCode helps you develop applications for Android and iOS using the unified Gradle project model.

🛠 CocoaPods integration

Kotlin/Native provides integration with the CocoaPods dependency manager. You can add dependencies on Pod libraries as well as use a multiplatform project with native targets as a CocoaPods dependency (Kotlin Pod).

🛠 MOKO KSwift gradle plugin

KSwift it's gradle plugin for generation Swift-friendly API for Kotlin/Native framework.

🛠 CompleteKotlin gradle plugin

Gradle Plugin to enable auto-completion and symbol resolution for all Kotlin/Native platforms.

🛠 BuildKonfig gradle plugin

BuildConfig for Kotlin Multiplatform Project

🛠 Kotlin Native Xcode Support

Plugin to facilitate debugging iOS applications using Kotlin Native in Xcode. Defines Kotlin files as source code, with basic highlighting. Allows you to set breakpoints and includes llvm support to view data in the debug window. Xcode does not officially support custom language definitions, but they also don't explicitly block them.

🛠 Dokka documentation generation tool

Dokka is a documentation engine for Kotlin, performing the same function as javadoc for Java. Just like Kotlin itself, Dokka fully supports mixed-language Java/Kotlin projects. It understands standard Javadoc comments in Java files and KDoc comments in Kotlin files, and can generate documentation in multiple formats including standard Javadoc, HTML and Markdown.

Libraries

📋 Log

Napier - logger

Napier is a logger library for Kotlin Multiplatform. It supports for the Android, Darwin(iOS, macOS, watchOS, tvOS), JVM, JavaScript. Logs written in common module are displayed on logger viewer of each platform.

Kermit - logger

Kermit is a Kotlin Multiplatform logging utility with composable log outputs. The library provides prebuilt loggers for outputting to platform logging tools such as Logcat and NSLog.

Kodein-Log - logger

Kodein-Log is a lightweight Kotlin/Multiplatform logging library with a simple API, that works on JVM, Android, JavaScript, iOS, as well as for all Kotlin/Native targets.

Klogger - logger

Klogger is a logger library for multiplatform Kotlin. This library provides a simple interface to do logging into suitable outputs like javascript’s console, or stdout/stderr.

Cabret - logger

This is an Kotlin Library that enables Annotation-triggered method call logging for Kotlin Multiplatform.

KmLogging - logger

Kotlin multiplatform logging. High performance, composable and simple to use.

Kydra Log - logger

Kotlin Multiplatform Library that allows to write logs in common module.

🌎 Network

Ktor - http client

Ktor includes a multiplatform asynchronous HTTP client, which allows you to make requests and handle responses, extend its functionality with plugins (formerly known as features), such as authentication, JSON serialization, and so on.

Apollo GraphQL - GraphQL client

A strongly-typed, caching GraphQL client for the JVM, Android, and Kotlin multiplatform.

kgql - GraphQL Document wrapper generator

GraphQL Document wrapper generator for Kotlin Multiplatform Project. Currently, available for JVM/Android/iOS

WebRTC KMP - WebRTC client

WebRTC Kotlin Multiplatform SDK

Krossbow - WebSocket client

A coroutine-based Kotlin multi-platform WebSocket client and STOMP 1.2 client over web sockets.

MOKO SocketIo - Socket.IO implementation

This is a Kotlin Multiplatform library that provides real-time, event-based communication for iOS and Android.

rsocket - RSocket Kotlin multi-platform implementation

RSocket is a binary protocol for use on byte stream transports such as TCP, WebSockets and Aeron.

📦 Storage

Multiplatform-Settings - Key-Value preferences

This is a Kotlin library for Multiplatform apps, so that common code can persist key-value data

KVault - secure key-value storage

It acts as an iOS Keychain wrapper and implements encrypted SharedPreferences for Android.

SQLDelight - SQLite database

SQLDelight generates typesafe kotlin APIs from your SQL statements. It verifies your schema, statements, and migrations at compile-time and provides IDE features like autocomplete and refactoring which make writing and maintaining SQL simple.

Realm - NoSQL database

Realm is a mobile database that runs directly inside phones, tablets or wearables. This repository holds the source code for the Kotlin SDK for Realm, which runs on Kotlin Multiplatform and Android.

cache4k - In-memory Cache

Provides a simple in-memory key-value cache for Kotlin Multiplatform, with support for time-based (expiration) and size-based evictions.

SQLiter - SQLite driver

SQLiter is a SQLite driver for Kotlin Native, currently Apple and Windows variants. It is designed to serve as a driver to power user-friendly libraries rather than something to use directly. Currently SQLiter powers the SQLDelight library on native clients.

Kodein-DB - NoSQL database

Kodein-DB is a Kotlin/Multiplatform embedded NoSQL database that works on JVM, Android, Kotlin/Native and iOS. It is suited for client or mobile applications.

📱 Device

MOKO Permissions - System permissions manager

Kotlin Multiplatform library for providing runtime permissions on iOS & Android

MOKO Resources - System resources manager

This is a Kotlin Multiplatform library that provides access to the resources on iOS & Android with the support of the default system localization.

MOKO Geo - Location manager

Geolocation access for mobile (android & ios) Kotlin Multiplatform development

MOKO Biometry - System biometry manager

This is a Kotlin Multiplatform library that provides authentication by FaceId and TouchId (Fingerprint)

MOKO Media - System media manager

This is a Kotlin Multiplatform library that provides media picking in common code (photo/video) and video player controls.

MOKO Maps - Google/Mapbox maps manager

This is a Kotlin Multiplatform library that provides controls of maps to common code.

Kable - Coroutines-powered API for interacting with Bluetooth Low Energy devices.

Kotlin Asynchronous Bluetooth Low Energy provides a simple Coroutines-powered API for interacting with Bluetooth Low Energy devices.

Blue-Falcon - A Bluetooth kotlin multiplatform library for iOS and Android

A Bluetooth "Cross Platform" Kotlin Multiplatform library for iOS, Android, MacOS, Raspberry Pi and Javascript. Bluetooth in general has the same functionality for all platforms, e.g. connect to device, fetch services, fetch characteristics.

Connectivity status - Multiplatform connectivity status

This Kotlin multiplatform mobile utility library allows monitoring the internet connection status of the device. You can use it from shared code as well as directly from Android or iOS code.

💉 Dependency Injection

Koin - DI framework

A pragmatic lightweight dependency injection framework for Kotlin developers. Koin is a DSL, a light container and a pragmatic API

Kodein - DI framework

Kodein-DI is a very simple and yet very useful dependency retrieval container.

PopKorn - DI framework

PopKorn is a simple, powerful and lightweight Kotlin Multiplatform Dependency Injector. It doesn't need any modules or components, just use it without writing a single extra file! It supports AND, IOS, JVM, JS and NATIVE.

🏗 Architecture

MVI Kotlin - MVI framework

MVIKotlin is a Kotlin Multiplatform framework that provides a way of (not only) writing shared code using MVI pattern. It also includes powerful debug tools like logging and time travel.

Redux Kotlin - Redux framework

Redux implementation for Kotlin (supports multiplatform JVM, native, JS, WASM)

FlowRedux - Statemachine library with nice DSL

Building async. running Kotlin Multiplatform state machine made easy with a DSL and coroutines.

Mobius.kt - Mobius Framework

Kotlin Multiplatform Mobius implementation.

MOKO MVVM - MVVM framework

This is a Kotlin Multiplatform library that provides architecture components of Model-View-ViewModel for UI applications. Components are lifecycle-aware on Android.

Oolong - MVU for Kotlin Multiplatform

Oolong is an Elm inspired Model-View-Update (MVU) implementation for Kotlin multiplatform.

Summer - Share ViewModels between iOS, Android and Web apps

Summer is a presentation level library with kotlin-multiplatform support. It can be used to share viewModels between iOS, Android and Web apps. Summer does not use code generation and thus have not significant effort on compilation time and odd build-time errors. Project aims to have out-of-box support of Android Framework, Jetpack Compose, UIKit and SwiftUI without any adapters and platform-specific limitations.

Decompose - componentization and navigation

Decompose is a Kotlin Multiplatform library for breaking down your code into lifecycle-aware business logic components (aka BLoC), with routing functionality and pluggable UI (Jetpack Compose, Android Views, SwiftUI, JS React, etc.)

multiplatform-paging - Pagination library for KMM

A Kotlin Multiplatform library for pagination.

🔍 Analytics

MOKO Crash Reporting - reporting to Crashlytics

Fatal and Non-Fatal reporting to Crashlytics for Kotlin Multiplatform Mobile

CrashKiOS - Crash reporting for Kotlin/Native iOS applications

Thin library that provides symbolicated crash reports for Kotlin code on iOS.

🩺 Test

Kotest - test framework

Powerful, elegant and flexible test framework for Kotlin with additional assertions, property testing and data driven testing

🔑 Crypto

Libsodium - Libsodium bindings for Kotlin Multiplatform

Libsodium bindings project uses libsodium c sources and libsodium.js to provide a kotlin multiplatform wrapper library for libsodium.

Krypto - Pure Kotlin cryptography library

SecureRandom, Hash (MD5/SHA1/SHA256), AES

cryptohash - A set of cryptographic (and not so cryptographic) hashing functions

xxHash, Blake, HMAC, Keccak, MD5, SHA, etc

📁 File

Okio - access, store, and process your data

Okio is a library that complements java.io and java.nio to make it much easier to access, store, and process your data.

KorIO - access, store, and process your data

KorIO is a library for Charsets, Encodings, Checksums, Compression, I/O, Streams, Virtual File System, Networking, Http, WebSockets, Serialization…

Suparnatural FS - file system i/o

Kotlin multiplatform file system i/o for android, iOS, Java and NodeJS

🚀 Language extentions

Arrow - Functional companion to Kotlin's Standard Library

Arrow aims to provide a lingua franca of interfaces and abstractions across Kotlin libraries. For this, it includes the most popular data types such as Option, Either, Validated etc and functional operators such as traverse and computation blocks to empower users to write pure FP apps and libraries built atop higher order abstractions.

Result - success/failure result

This is a tiny framework for modelling success/failure of operations in Kotlin. In short, it is a model in type of Result<V: Any?, E : Throwable>.

🗃 Serializer

kotlinx.serialization - JSON serialization

Kotlin serialization consists of a compiler plugin, that generates visitor code for serializable classes, runtime library with core serialization API and support libraries with various serialization formats.

MOKO Parcelize - Parcelize in common code

This is a Kotlin Multiplatform library that supports Parcelize in common code.

Pbandk - Kotlin code generator and runtime for Protocol Buffers.

It has the core set of protobuf features implemented and is being used in production.

⏰ Date-Time

Kotlinx DateTime - Date & Time library

A multiplatform Kotlin library for working with date and time.

Klock - Date & Time library

Klock is a Date & Time library for Multiplatform Kotlin. It is designed to be as allocation-free as possible using Kotlin inline classes, to be consistent and portable across targets since all the code is written in Common Kotlin, and to provide an API that is powerful, fun and easy to use.

Island Time - Date & Time library

A Kotlin Multiplatform library for working with dates and times, heavily inspired by the java.time library.

➿ Asynchronous

Kotlinx Coroutines - Kotlin coroutines

Library support for Kotlin coroutines

Reaktive - Reactive Extensions

Kotlin multiplatform implementation of Reactive Extensions.

Kotlinx Atomicfu - atomic operations

The idiomatic way to use atomic operations in Kotlin.

Stately - Kotlin Multiplatform State Library

Stately is a state utility library to facilitate state management in Kotlin Multiplatform.

CoroutineWorker - Workers for Kotlin Native

Kotlin Coroutine-based workers for native

Koru - Coroutine wrappers for Kotlin Native

Automatically generates wrappers for suspend functions and Flow for easy access from Swift code in Kotlin Multiplatform projects.

KMP-NativeCoroutines - Swift wrapper for Kotlin Coroutines

Library to use Kotlin Coroutines from Swift code in KMP apps

🎵 Audio

Korau - Kotlin cORoutines AUdio

Pure Kotlin WAV, MP3 and OGG vorbis decoders

🎨 Graphics

MOKO Graphics - Graphics primitives

This is a Kotlin Multiplatform library that provides graphics primitives to common code.

Korim - Imaging utilities

Kotlin cORoutines IMaging, Bitmap and Vector graphics for Multiplatform Kotlin

🧩 Service SDK

Firebase Kotlin SDK - A Kotlin-first SDK for Firebase

The Firebase Kotlin SDK is a Kotlin-first SDK for Firebase. It's API is similar to the Firebase Android SDK Kotlin Extensions but also supports multiplatform projects, enabling you to use Firebase directly from your common source targeting iOS, Android or JS.

VK SDK Kotlin - Unofficial VK SDK

Create a chat-bot for VK.com in a few lines of code, use the API and forget about the limitations

bitcoin-kmp - Kotlin Multiplatform Bitcoin Library

This is a simple Kotlin Multiplatform library which implements most of the bitcoin protocol

MOKO Tensorflow - Mobile Kotlin TensorFlow

This is a Kotlin MultiPlatform library that provides access to TensorFlow-Lite functionality from common source set.

qBittorrent - wrapper for the qBittorrent Web API

Multiplatform Kotlin wrapper for the qBittorrent Web API using Ktor.

Cognito-idp - AWS Cognito Identity Provider

Lightweight AWS Cognito Identity Provider client for Kotlin Multiplatform and Typescript projects.

TMDb API - access to TMDb API

This library gives access to TMDb API version 3 and 4 for mobile, desktop, and web applications. It supports Swift, Kotlin, and JavaScript by setting up as a Kotlin Multiplatform project.

🧮 Arithmetic

KBigNum - Big Numbers

Library for Big Numbers

BigNum - Big Numbers

Kotlin Multiplatform BigNum library is a pure kotlin implementation of arbitrary precision arithmetic operations. It follows the same approach as Kotlin does on JVM to keep the interface familiar.

🔧 Utils

UUID - UUID generator

Kotlin Multiplatform UUID generator

Colormath - Multiplatform Kotlin color conversion and manipulation

Colormath is a Kotlin Multiplatform library for color manipulation and conversion.

GEOK - Kotlin geometry library

Small geometry library for Java and Kotlin. Contains useful basic utilities that require on most application.

fluid-currency - currency library

Kotlin multiplatform currency library.

fluid-country - country library

Kotlin multiplatform country library.

Kmem - Data primitives

Kmem is bit, array and fast memory utilities library for multiplatform Kotlin

KaseChange - convert strings between various case formats

Multiplatform Kotlin library to convert strings between various case formats including Camel Case, Snake Case, Pascal Case and Kebab Case

FuzzyWuzzy-Kotlin - Fuzzy string matching for Kotlin

Useful for selecting the closest matching string from a collection of strings. Various algorithms are available.

Suggest your an idea

What libraries are you missing?

Authors

https://github.com/terrakok/kmm-awesome/graphs/contributors

Contribution guide

Feel free to contribute. Follow common style and welcome! :)

License

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.