tyiuandClaude Sonnet 5
188536867d
webHtmlApp is a new web build using Compose HTML instead of Compose Multiplatform UI's Skia/canvas renderer - real <select>/<input>/<button> elements, an anchored popup menu for reordering/removing currencies (Compose HTML has no built-in DropdownMenu), and locale-independent English strings (moko-resources' Compose integration pulls in compose.foundation/ui, which this module exists to avoid). Realizing the bundle-size win needed splitting sharedUi out of shared: the Compose Multiplatform Gradle plugin bundles Skiko's several-MB web runtime into any js/wasmJs target whose resolved dependencies contain org.jetbrains.compose.ui:ui anywhere, and shared previously declared it directly for the other (Skia-based) web app's UI. shared is now pure business/data logic with no Compose dependency; sharedUi holds App()/ PriceScreen() for androidApp, desktopApp, and webApp to render. PriceViewModel's ViewModel supertype and CurrencyConverter's BigDecimal params moved from implementation() to api() in shared, since they're part of its public surface that webHtmlApp now touches directly. Also drops the @js-joda/timezone dependency from both web builds: the app only ever calls TimeZone.currentSystemDefault(), which resolves to a synthetic zone backed by the native Date offset on Kotlin/JS and never touches the tz database - confirmed empirically on both js and wasmJs targets. Cuts webApp's js bundle by ~950 KB and webHtmlApp's by ~800 KB. currencyFlagEmoji() gained an explicit supportsFlagEmoji parameter (defaulting to the existing expect/actual, false on web) so webHtmlApp can opt in - Compose HTML renders real DOM text, so flag emoji work fine there even though they don't on Compose Multiplatform's canvas. website/serve-local.sh now builds and serves webHtmlApp instead of webApp's wasmJs build, so it no longer mirrors what's actually deployed to production; docs updated to reflect the new module layout and that divergence, and the Pages workflow's path trigger now includes sharedUi/** so UI changes there still redeploy the site. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
SatsPrice
This app fetches the price of Bitcoin relative to common fiat currencies from multiple sources, and converts inputted amounts between Sats, BTC, and the selected fiat currency.
Download and Install
Supported Platforms
iOS 16.0+ • macOS 13.0+ • Android 7.0+ • Web (any modern browser)
Screenshots
Android
iPhone
iPad
macOS
Kotlin Multiplatform
This is a Kotlin Multiplatform project targeting Android, iOS, macOS, Web, and Desktop (JVM).
-
/shared contains almost the entire app — UI (built with Compose Multiplatform), view models, data sources, and domain logic. commonMain holds code shared by every target, alongside platform-specific source sets:
androidMain,jvmMain(Desktop),appleMain(iOS and macOS), andwebMain(JS and Wasm). -
/androidApp, /desktopApp, and /webApp are thin launcher shells around
shared's Compose UI. -
/iosApp is a native SwiftUI app (shared across iOS and macOS), not Compose — it talks to
sharedthrough a hand-written bridge rather than rendering Compose directly.
Running the apps
Use the run configurations provided by the run widget in your IDE's toolbar. You can also use these commands and options:
- Android app:
./gradlew :androidApp:assembleDebug - Desktop app:
- Hot reload:
./gradlew :desktopApp:hotRun --auto - Standard run:
./gradlew :desktopApp:run
- Hot reload:
- Web app (Compose Multiplatform UI, Skia-rendered - what's deployed to production):
- Wasm target (faster, modern browsers):
./gradlew :webApp:wasmJsBrowserDevelopmentRun - JS target (slower, supports older browsers):
./gradlew :webApp:jsBrowserDevelopmentRun
- Wasm target (faster, modern browsers):
- Web app, DOM alternative (Compose HTML UI, renders real DOM instead of Skia/canvas - not what's
deployed to production):
./gradlew :webHtmlApp:jsBrowserDevelopmentRun - iOS app: open the /iosApp directory in Xcode and run it from there.
- Website with the web app built and served at
/app/(thewebHtmlAppDOM build, not the one production actually deploys):./website/serve-local.sh(serves at http://localhost:8000 by default; pass a port number to override)
Running tests
Use the run button in your IDE's editor gutter, or run tests using Gradle tasks:
- Android tests:
./gradlew :shared:testAndroidHostTest - Desktop tests:
./gradlew :shared:jvmTest - Web tests:
- Wasm target:
./gradlew :shared:wasmJsTest - JS target:
./gradlew :shared:jsTest
- Wasm target:
- iOS tests:
./gradlew :shared:iosSimulatorArm64Test
Attribution
This project uses Kotlin Multiplatform, Compose Multiplatform, and Kotlin/Wasm, along with the following libraries:
- Ktor for networking
- SQLDelight for local persistence
- moko-resources for multiplatform string/resource handling
- kotlinx.coroutines, kotlinx.serialization, and kotlinx.datetime
- kotlin-wrappers for browser/JS interop on the Web target
- kotlin-multiplatform-bignum for arbitrary-precision arithmetic
The Bitcoin Calculator icon was created by Icon home and licensed as free for personal and commercial use with attribution.
The following free APIs are used:
- Coinbase
- CoinGecko