Dayman is a watch app which displays the time since last sunrise. Spending a day without usual watch but with this watch make you more thankful to the sun:)
Alarm is also available. Setting alarm 0:00 to this watch wakes you up on sunrise time everyday. Setting alarm 23:00 to this watch wakes you up one hour before sunrise everyday. (When you use alarm, please allow push notification, cancel silent mode, and raise the volume in advance.)
Of course, you can also check the time with your Apple watch. If you achieve waking up on sunrise(0:00), break fast on 1:00, lunch on 6:00, dinner on 13:00, and going to bed on 16:00, you would be a dayman. How about going to be a dayman from today?

*In this app, sunrise time is calculated by simplified model. So sometimes it's different from meteorological one by a few minutes.