Trouble updating iphone
If you're on the public beta program, that seed might have a connection issue with the watch.
If nothing works, you can try resetting your i Phone.
Go to Settings → General → Reset → Reset All Settings.
These are a few steps which I had explored on my i Phone to resolve the issue of Apps which are not downloading or updating.
It's rare, but it can also be a pretty confusing situation, especially because updating apps on your i Phone is usually as simple as tapping a few buttons.
There are a lot of ways to solve this problem, but the fixes aren't obvious.