Activitytracker for the stomach

"Food holds the body and soul together" or "love goes through the stomach" are old sayings.Do we need an activity tracker for the stomach?

It could be used to record how frequently a person is eating and could help monitor various gut disorders.

See also:

nature.com - Flexible piezoelectric devices for gastrointestinal motility sensing
outsideonline.com - New science: training your gut