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 W194 photo

iSPort's E Ink watch started shipping in 2016 for $55. It is no longer available. You can find more info at

E Ink display info: 
Flexible E Ink display