explaingit

Popular Kotlin repositories on GitHub, each explained for non-coders — what it does, its tech stack, and how to run it.

• topjohnwu/magiskMagisk is an Android system modification tool that applies changes without altering the base system, allowing
• 2dust/v2rayngAndroid app that routes your device's internet traffic through V2Ray proxy servers, supporting multiple protoc
• jetbrains/kotlinThe official source repository for the Kotlin programming language, maintained by JetBrains. Contains the comp
• square/okhttpOkHttp is a networking library for Java, Kotlin, and Android apps that makes HTTP requests cleaner and faster
• gedoor/legadoFree Android app for reading online novels from any website by defining custom scraping rules, with no ads and
• android/architecture-samplesAndroid Architecture Samples is Google's official reference app showing developers how to correctly structure
• bannedbook/fanqiangCurated collection of guides and tools to bypass internet censorship, particularly China's Great Firewall. Cov
• gkd-kit/gkdAn Android app that automatically taps elements on your screen — like dismissing ads or skipping startup dialo
• shadowsocks/shadowsocks-androidShadowsocks for Android tunnels your phone's internet traffic through an encrypted proxy to bypass internet ce
• alibaba/p3cAlibaba p3c is a set of 49 automated Java code-quality rules and IDE plugins for IntelliJ IDEA and Eclipse tha
• square/leakcanaryLeakCanary is an Android development library that automatically detects memory leaks in your app while you tes
• signalapp/signal-androidSignal Android is the official open-source Android app for Signal private messaging — it keeps your texts, voi
• revanced/revanced-managerReVanced Manager is an Android app that lets you apply community-built patches to other apps on your phone — r
• kavishdevar/librepodsAndroid app that restores Apple AirPods features (noise cancellation, battery display, auto-pause) that Apple
• junkfood02/sealSeal is a free, ad-free Android app that downloads videos and audio from thousands of websites — YouTube, TikT
• pppscn/smsforwarderAndroid app that monitors SMS, calls, and notifications, then forwards them to messaging platforms, email, web
• rikkaapps/shizukuAndroid library that lets apps access system-level APIs by routing requests through a privileged background se
• cymchad/baserecyclerviewadapterhelperAn Android library that removes the boilerplate from building scrollable lists, letting you display feeds, cat
• android/compose-samplesOfficial sample Android apps demonstrating Jetpack Compose, Google's modern toolkit for building app interface
• google-ai-edge/galleryRun AI language models directly on your phone with no internet or privacy concerns. Download a model, chat off
• google/ioschedReference Android app from Google I/O conference showing how to build a well-structured production app with mo
• android/nowinandroidA fully working Android app from Google's Android team that demonstrates, in real production-quality code, how
• matsuridayo/nekoboxforandroidNekoBox for Android is a proxy client app that supports a wide range of protocols including Shadowsocks, VMess
• afollestad/material-dialogsA Kotlin library for Android that replaces default system dialogs with polished Material Design pop-ups — incl
• jetbrains/compose-multiplatformA Kotlin UI framework from JetBrains that lets you write one app interface and share it across Android, iOS, d
• square/picassoA now-deprecated Android library from Square that downloads, caches, and displays remote images in your app wi
• google/flexbox-layoutAn Android library that brings the web's flexible box layout system to Android apps, letting items grow, shrin
• android/sunflowerSample Android gardening app from Google showing how to migrate an existing View-based app to Jetpack Compose
• open-ani/animekoAn open-source anime-watching app for Android, iOS, Windows, macOS, and Linux that combines episode tracking,
• lottie-react-native/lottie-react-nativeReact Native component that plays Lottie animations — JSON files exported from Adobe After Effects — natively
• tiann/kernelsuA kernel-based root solution for Android. Grants unrestricted admin access by hooking into the kernel rather t
• nickbutcher/plaidPlaid is an Android reference app showcasing Material Design with a feed of design news, rewritten in Kotlin u
• kotlin/ankoDeprecated Kotlin library that let Android developers build UIs, run SQLite queries, and use coroutines direct
• amir1376/ab-download-managerA free desktop download manager that splits files into parallel parts for faster downloads. Runs on Windows, m
• mamoe/miraimirai is a Kotlin library that implements the QQ Android client protocol so you can build cross-platform QQ ch
• ktorio/ktorKotlin web framework for building asynchronous HTTP servers and APIs, kept lightweight by letting you install
• mobile-dev-inc/maestroAn open-source tool for writing mobile app tests as simple YAML files — describe taps, swipes, and text input
• iamgio/quarkdownQuarkdown lets you write documents in an enhanced Markdown format with programmable functions, then export the
• kotlin/kotlinx.coroutinesOfficial Kotlin library for writing asynchronous code in a readable, sequential style — lets apps fetch data o
• thunderbird/thunderbird-androidThunderbird for Android is a free, open-source email app from Mozilla that manages multiple email accounts wit
• android/uampA deprecated Google sample Android music player app in Kotlin showing how to build audio playback that works a
• openhub-store/github-storeGitHub Store is a free open-source app that turns GitHub Releases into a familiar app-store experience — brows
• t8rin/imagetoolboxA free and open-source Android app with dozens of photo editing tools including cropping, filters, background
• tamsiree/rxtoolRxTool is a modular Kotlin library for Android developers that bundles common utilities — UI components, camer
• libre-tube/libretubeA free, open-source Android YouTube client that routes your traffic through the Piped privacy proxy so Google
• yiiguxing/translationpluginTranslationPlugin adds instant translation to JetBrains IDEs like IntelliJ IDEA and Android Studio, letting de
• coil-kt/coilCoil is a Kotlin image loading library for Android and Compose Multiplatform apps that fetches and displays re
• mikepenz/materialdrawerMaterialDrawer is an Android library that adds a ready-made Material Design navigation drawer — the sliding si
• wasabeef/recyclerview-animatorsAn Android library that adds smooth animations when items are added, removed, or scroll into view in a list. D
• heapy/awesome-kotlinA community-curated list of Kotlin libraries, tools, articles, videos, and other resources for developers buil
• yujincheng08/biliroamingBiliRoaming is an Android add-on that removes geographic content locks on the Bilibili video app, letting user
• shabinder/spotiflyerA music downloader app for Android and desktop that saves songs, albums, and playlists from Spotify, YouTube M
• ankidroid/anki-androidThe Android version of Anki, a free flashcard app that uses spaced repetition and the FSRS algorithm to help y
• hectorqin/readerSelf-hosted server that brings the popular Chinese legado e-book reader to desktop browsers and iOS, letting y
• jakewharton/timberTimber is a lightweight Android logging library that automatically tags log messages with the calling class na
• appintro/appintroAn Android library that adds swipeable onboarding intro screens to any app with a few lines of code, including
• yairm210/uncivA free, open-source Civilization V remake for Android and desktop that runs on low-powered devices, skips high
• jetbrains/ideavimAn official JetBrains plugin that adds Vim keyboard controls to IntelliJ IDEA, PyCharm, WebStorm, GoLand, and
• square/moshiMoshi is a JSON library from Square for Android, Java, and Kotlin that converts between JSON text and your app
• breezy-weather/breezy-weatherBreezy Weather is a privacy-focused open-source Android weather app supporting 50+ weather sources with detail
• vfsfitvnm/vimusicAn Android app that streams music from YouTube Music for free, with offline caching, synchronized lyrics, and
• metrolistgroup/metrolistA free Android app that streams YouTube Music with features the official app lacks, including offline download
• firebase/quickstart-androidA collection of standalone Android app samples from Google's Firebase team, each showing exactly how to integr
• jetbrains/exposedAn official JetBrains database library for Kotlin that lets you query relational databases using type-safe Kot
• maxrave-dev/simpmusicA free, open-source Android and desktop music player that streams from YouTube Music without ads or a subscrip
• square/okioA utility library from Square that simplifies reading and writing files, network sockets, and byte data in And
• bitwarden/androidThis is the open-source Android source code for Bitwarden's password manager and two-factor authentication app
• deniscerri/ytdlnisAn Android app that downloads audio and video from over 1000 websites including YouTube — paste a link, pick y
• kotatsuapp/kotatsuA free, open-source Android manga reader that connects to over 1,200 online sources, supports offline download
• skydoves/pokedexA sample Android app that fetches and displays Pokémon data from a public API, built as a reference for modern
• florisboard/florisboardA free, open-source Android keyboard that keeps all your data on your device instead of sending it to company
• zhanghai/materialfilesAn open-source Android file manager with Material Design styling that handles network storage (FTP, SFTP, SMB,
• ackites/nrfrAndroid app that changes the country code your phone reads from its SIM card, fixing carrier compatibility iss
• bmax121/apatchAn Android rooting tool that patches the kernel directly, supports existing Magisk-compatible modules, and all
• arisguimera/android-expertFree beginner Android development course in Spanish that teaches Kotlin from zero and walks through building f
• aniyomiorg/aniyomiA free, open-source Android app that combines manga reading and anime watching in one place, with a built-in v
• zetbaitsu/compressorA Kotlin Android library that shrinks photo file sizes before uploading or storing them, with a one-liner API
• readyouapp/readyouA free open-source RSS reader app for Android with Material You design that collects articles from blogs and n
• ceuilisa/pixiv-shaftAn unofficial open-source Android app for Pixiv that lets you browse illustrations, manga, and novels with dar
• reactivex/rxkotlinA small Kotlin library that adds convenience shortcuts to RxJava, making reactive programming code more concis
• jetbrains/kotlin-nativeArchived original repository for Kotlin/Native, JetBrains' technology that compiles Kotlin to run directly on
• detekt/detektA tool that automatically scans Kotlin code for problems, style issues, and overly complex logic before you ru
• libchecker/libcheckerAn Android app that shows which third-party libraries are used by apps installed on your phone, including whet
• droid-ify/clientOpen-source Android app for browsing and installing free software from F-Droid repositories with a cleaner int
• gurupreet/composecookbookSample Android app demonstrating hundreds of Jetpack Compose UI components, animations, and layouts, including
• sqldelight/sqldelightA Kotlin tool that converts SQL queries written in .sql files into type-safe, compiler-checked Kotlin code, ca
• igorwojda/android-showcaseA sample Android music-discovery app built to demonstrate how to structure a production-ready mobile app using
• sourcerer-io/sourcerer-appA developer profiling tool that scans GitHub and local git repositories to build a visual profile showing whic
• chrisbanes/tiviTivi was a TV show tracking app built with Kotlin Multiplatform that shared code across Android, iOS, and desk
• kunzisoft/keepassdxA free, open-source Android password manager that stores all your passwords in an encrypted file on your devic
• d4rken-org/sdmaid-seAn Android app for cleaning and managing phone storage — removes leftover files from uninstalled apps, clears
• androidx/androidxThe official source repository where Google develops Android Jetpack — a suite of libraries for Android app de
• z-huang/innertuneInnerTune is a free Android music app that streams YouTube and YouTube Music without ads or a paid subscriptio
• airbnb/mavericksAirbnb's Android framework for building app screens faster — each screen holds its data in a state object, a V
• kotlin/kotlinx.serializationJetBrains' official Kotlin library for converting data objects into JSON, Protobuf, CBOR, and other formats —
• aistra0528/hailA free Android app that freezes, hides, or suspends apps you are not using to save battery and stop background
• mygod/vpnhotspotAndroid app that shares your phone's active VPN connection with other devices over a Wi-Fi hotspot. Requires r
• kickstarter/android-ossThe full source code of Kickstarter's official Android app, released publicly so developers can study how a re
• drakeet/multitypeMultiType is an Android library that makes it easy to build scrolling lists with many different visual styles.
• sagernet/sagernetAn Android app that routes internet traffic through a proxy to bypass censorship and access blocked content. S
• mockk/mockkTesting library for Kotlin that lets you create controlled fake versions of classes and interfaces to isolate
• kizitonwose/calendarAn Android calendar library for Kotlin developers that handles all display and selection logic while you contr
• tapadoo/alerterAlerter is an Android library that shows customizable notification banners sliding in from the top of the scre
• wxxsfxyzm/installerx-revivedAn Android app that replaces the default APK installer with more options, including split APK support, root-le
• firebase/firebaseui-androidA ready-made Android library from Google with drop-in UI components for Firebase sign-in, live database lists,
• simondankelmann/bluetooth-le-spamAn Android app that broadcasts fake Bluetooth Low Energy device advertisements, causing nearby iPhones and Win
• kotest/kotestA flexible testing framework for Kotlin that supports multiple ways to write tests, property-based testing wit
• hxh19950701/webviewtvliveAn Android app that loads live TV broadcasts from broadcaster websites directly inside the app using a browser
• samolego/cantaAn Android app that lets you uninstall pre-installed bloatware and system apps from your phone without root ac
• vremsoftwaredevelopment/wifianalyzerA free Android app that scans nearby Wi-Fi networks and shows their signal strength, channel usage, and conges
• aliucord/aliucordA mod platform for the older Android Discord app that lets you install community-made plugins and custom theme
• plainhub/plain-appA free, open-source Android app that turns your phone into a local server so you can browse files, read SMS, s
• mm2-0/kvaesitsoKvaesitso is a free, open-source Android home screen replacement built around search — type what you want inst
• lizongying/my-tv-0My TV is an Android TV app that plays IPTV live streams from a custom channel list you provide, letting you wa
• izhangzhihao/intellij-rainbow-bracketsRainbow Brackets colors matching bracket pairs in distinct hues inside JetBrains IDEs, making nested code much
• kittinunf/fuelFuel is a Kotlin HTTP library for Android and JVM apps that makes network requests readable and simple — add a
• neoapplications/neo-storeNeo Store is a modern Android app for browsing and installing free, open-source apps from F-Droid and 100+ com
• android/user-interface-samplesA collection of small Android app examples demonstrating specific UI features in Kotlin, though most samples h
• revanced/revanced-patches-templateAn official starting-point template for building and publishing your own collection of ReVanced patches — code
• aaswordman/operitAn Android AI assistant app that connects AI models to your phone's real capabilities: managing files, browsin
• moezbhatti/qksmsQKSMS is a clean, open-source Android SMS and MMS app that replaces the default messaging app with a Material
• streetcomplete/streetcompleteAn Android app that lets anyone improve the OpenStreetMap world map by answering simple questions about nearby
• intellij-rust/intellij-rustA now-deprecated community Rust plugin for JetBrains IDEs that added syntax highlighting, code completion, and
• rikkahub/rikkahubAn Android app that lets you chat with multiple AI services using your own API key, supporting text, images, P
• chuckerteam/chuckerA two-line-to-add Android debugging library that captures every network request and response your app makes an
• oxygencobalt/auxioAuxio is a free, open-source local music player for Android that plays audio files from your device — no inter
• rumboalla/apkupdaterAPKUpdater is a free Android app that checks for updates across multiple app sources at once — APKMirror, F-Dr
• kotlin/dokkaThe official documentation generator for Kotlin maintained by JetBrains. It reads comment blocks in Kotlin and
• hdshare/wauxiliary_publicWAuxiliary is an Android module that adds unofficial features and tweaks to the WeChat app at runtime using th
• harmony-on-android/hoaAndroid runtime that loads and executes OpenHarmony HAP apps written in ArkTS or ArkUI, by patching ArkUI-X 6.
• amrdoh/clockmasterThird-party Android clock app written in Kotlin with a Material Expressive visual style, distributed as a GitH
• omarahmedx14/my-android-playgroundPersonal Android learning project in its foundation phase, set up with Kotlin, Jetpack Compose, Hilt, Room, an
• wifi-x-smasher/nuvio-windows-unofficialAn unofficial Windows desktop app that brings the Nuvio streaming organizer to PC, letting you browse your add
• huiyeji-7/pei-pei-shuaAn Android study app for China's civil service exam that adds a floating AI button over any app — tap it to sc
• nils0000shiyong/kuaida-ai-assistantAn Android app that listens to job interview questions, transcribes them, and generates a spoken-style answer
• m4xx3d0ut/1337-boardAn Android keyboard for developers and terminal users that adds missing keys like Escape, Tab, Ctrl, Alt, and
• areu01or00/hermes-agent-mobile-clientAn Android WebView wrapper that loads the Hermes Agent dashboard from your computer so you can use the AI assi
• dw2lam/openlauncherA custom Android home screen for aftermarket car head units that replaces generic phone-style launchers with a
• android/appfunctionsOfficial Google sample showing how an Android app can publish actions like send-message or start-call through
• mfairley/expo-callkit-telecomExpo module that wraps iOS CallKit and Android Jetpack Core-Telecom with one API so React Native apps can show
• sky22333/skyadbAn Android app that lets you control other Android devices over Wi-Fi using ADB, giving you app management, fi
• thecybersandeep/androidspectAndroidSpect turns a rooted Android phone into a local inspection server. Visit it from any browser on the sam
• getnopeek/nopeek-androidNoPeek is an Android app that scans for nearby smart glasses and VR headsets such as Meta Ray-Ban and Apple Vi
• sir-mmd/dataproxyAn Android app that turns your phone into a SOCKS5 proxy server, routing all connected device traffic through
• meta-quest/portal-samplesA starter Android app from Meta showing developers how to build for Meta Portal smart displays, with working e
• starbrightlab/immortalA custom launcher, photo frame screensaver, and community app store for discontinued Meta Portal smart display
• lyosu/hortay-androidAndroid app that shows your Telegram channel subscriptions as one chronological feed instead of a chat list, w
• composablehorizons/material-3-compose-unstyledA Kotlin library of Material 3 UI components that work on both Android and desktop, separating visual styling
• lilmuff2/bsmlAn Android app that lets Brawl Stars players load visual and data mods into the game without rooting their dev
• freenetio/fakesniAndroid app bypassing deep packet inspection firewalls by spoofing Server Name Indication (SNI) in HTTPS hands
• dev778g-me/kornerA Kotlin library for Compose Multiplatform that replaces standard circular corner rounding with superellipse (
• androidpoet/openai-kmpKotlin Multiplatform SDK for the OpenAI APIs. Builds on Ktor, ships as fourteen small modules per endpoint fam
• itskenny0/rabbit-r1-haNative Android client for Home Assistant, built for the Rabbit R1's scroll wheel but also working on Android 1
• androidpoet/cloudflare-kmpA Kotlin Multiplatform library that lets Android, iOS, and desktop apps safely access Cloudflare's database, k
• leonxlnx/image-sorter-appPhotoSwipe is an Android app that turns clearing your camera roll into a swipe card game. Left deletes in batc
• ad-chd/decloudLocal Android-to-Windows file transfer app over WiFi or USB. No cloud, no account, with an Android app and an
• azcomp2000/battery-sentinelAn Android app written in Kotlin that monitors phone battery capacity and per-app drain without root, using a
• diredocks/cleanarchitecturenoteappFork of Philipp Lackner's Clean Architecture note-taking tutorial app for Android. A learner's copy of an MVVM

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