I have a verizon watch only account. I was able to get the new app working, but it was a struggle. I think it worked on the 3rd or 4th attempt. I had to start over and lost all of the contacts that were connected to the watch. Fortunately, there were only a few.
Overall, the Gizmo watch has been nice to have, but it leaves a lot to be desired. It's surprising that there are not better products in this market segment.