The CZ smartwatch can recommend the best time to take a power nap
(Picture: Citizen)With sleep tracking de rigueur on the best smartwatches, Citizen is focusing on power naps to help its latest timepiece stand out.
The watchmaker’s CZ smartwatch harnesses tech used by Nasa to help astronauts get some shut-eye in space, where zero-gravity and constantly recurring sunrises can play havoc with the body’s internal clock.
