I think it's really poor of Garmin to offer a rally great facility on the CONNECT APP - to make a HIIT workout or a CUSTOM workout - only to find that the Vivoactive IS NOT COMPSTIBLE. Tihs is a cynical step to get people to purchase a different watch. I use hardly any of the workout types that come as standard and I am now going to have to upgrade to an even more expensive sports watch to benefit from all the features on the Connect APP. Annoyingly I only found out about this feature as I noticed I could get a new badge if I completed a HIIT workout - only it's impossible on my watch. Why promote challenges that people cannot use on their phone? You don't even say "on your Venu watch" like the other challenges O I spent ages making it only to be left disappointed. GREAT MARKETING. Unimpressed as it would cost you nothing to include this in the software on the phone. Unless I am mistaken and there is a work around?? Nope.