There's an ever-expanding world of wellness wearables and fitness trackers targeting consumers with shiny promises of the personal value to be had if they monitor stuff like their heart rate, activity and sleep -- from smart watches, bands and rings, to smart scales, CGMs (continuous glucose monitors) and more. While such products look novel (and may have promise), there's a risk of unproven assessments misleading users about their health and/or making them anxious -- especially if people assume outputs are more meaningful than they actually are.