Bests & Worsts Reviews from Amazon

Most frustrating setup of a device I've ever encountered and I'm pretty tech savvy. Constantly just toggles back and forth between my name and "guest"? Have tried resetting device twice . Can't find a phone number anywhere for tech support! No chat option. Only a fast path email. Sent in numerous questions and waited all day. No reply. Found a number on the web and tried it as it showed headquartered in San Francisco. Voice prompt said not open at this hour which was noon California time. Bluetooth wont connect with my iPhone. So far I have a very expensive paperweight. I was actually considering buying the blood pressure cuff at same time. Sure glad I didn't . I don't normally ever even write reviews and when I do its because I'm thrilled as an avid and long time Prime customer--- but this appears to be only way to obtain a reply from Qardio. Extremely disappointed as the app is clean with a great UI and shows promise....but..... WOW . Epic fail.