Ionic doesn’t natively support smartwatch development since it’s focused on mobile and web apps. The Cordova plugin you found (cordova-plugin-watch) only works for iOS and isn’t actively maintained.For Apple Watch, you’d need a native WatchKit extension that communicates with your Ionic app via a custom Cordova or Capacitor plugin. For Wear OS, there’s no direct plugin; the common approach is to build a small native watch app (in Kotlin/Java) that syncs data with your Ionic app through an API or Bluetooth. In short, there’s no single cross-platform plugin for both watches; you’ll need native bridges for each platform.