Honorable MentionsWe have tested several other entrants to this nascent category, some good, some bad, and some in between. Here is the lowdown on some of your smart ring alternatives.Photograph: Adrienne So; Getty ImagesMovano Evie Ring for $269: When...
Sleep trackers can be inaccurate, and there is a surprising lack of testing and research on the subject. This research paper gives an overview of some of the research, and there have been some small studies, like this study...
