Try running simple adb commands
adb connect 192.168.xxx.xxx:5555 (your watch IP address & enable debugging)
adb shell
pm list packages
You will get an output list like this
package:com.android.cts.priv.ctsshim
package:com.google.android.ext.services
package:com.android.providers.telephony
The app ID is after package:
com.samsung.android.wear.shealth/com.samsung.android.wear.shealth.app.heartrate.view.HeartRateActivity
someone suggested to go to Play Store and download the Package names app . open it and you will see the apps that are installed on your phone.
Ron
Samsung Developer Relations