iSport's W194 is a fitness tracker that sports a flexible E Ink display. The watch monitors steps, distance walked, speed, calories and also your sleep. It can connect to both iOS and Android devices.
iSPort's E Ink watch started shipping in 2016 for $55. It is no longer available.
E Ink display info:
Flexible E Ink display
Posted: Jul 23,2016 by Ron Mertens