WC WCSession counterpart app not installed

Question

Making a connection between iOS and iWatch devices, xCode writes [WC] WCSession counterpart app not installed.

After a lot of research, I've found a solution, maybe it will be helpful for someone.

- Check your WatchKit Extention target. 
- Uncheck "Supports Running Without iOS App Installation"
- First run iwatch simulator, than run ios simulator with checkmark

Answer 1

It only worked for me by installing the Watch App from the watch settings app.

If I install the Watch App from xcode, the iOS app will give me the companion error message.

Answer 2

I have spent around 3-4 hr to fix this issue, it seems that somehow my Apple watch.app is missing from my Target > Frameworks so after clicking plus icon and adding it back, it doesn't report "WC WCSession counterpart app not installed" anymore