How do I sync the new app with my phone and watch?
That shouldn't work. You will have to ask the developer about that. My guess is that the Venu has been added as a compatible watch by mistake.
Is not the only compatible device listed by the developer although. I have read that a Barometric sensor is enough. Hope this is true
What happened to this app, works great, can't seem to find it in the app store anymore..... Vioactive3