Sleep-tracking devices have limits. Experts want users to know what they are
by R.J. RICO and EMILIE MEGNIEN edited by Andrew Zinin Editors’ notes The GIST Add as preferred source Middle school teacher Kate Stoye checks her sleep score on her phone, Wednesday, Jan. 7, 2026, in Hiram, Ga. Credit: AP Photo/Emilie Megnien Your watch says you had three hours of deep sleep. Should you believe it? Millions […]
Sleep-tracking devices have limits. Experts want users to know what they are Read More »
