Name: StarCalc Live
Rating: 4.8 (4 reviews)
Author: 3igen3ggy

This is actually my StarCalc app in form of a widget, with a lot less functionality. It tracks only Sun and Moon, but as its widget not app, you can use it while recording activity. 

The only other difference is that change date button actually refreshes time, so you can track movement of Sun and Moon almost "live" (depending how often you click the button).

Glance options:
First Line:
You can have day/night percentage and Moon illumination percentage instead of sunrise and sunset (if you have these on your main watchface, why double the data)

Second Line:
You can see only the future moonrise and moonset. For example if today moonrise is 0800 and moonset is 1600, then at 1700, the glance will present tomorrow moonrise and moonset so for example '0830 and '1630. The " ' " symbol means this is tomorrow moonrise/moonset.

Third Line:
By default you have sidereal time (*), solar time (S) and local time (L). You can set this line to be showing AM and Sun Intenstiy + Local Time. You can choose to have these atmospheric data caltulated either at your altitude (taken from altitude that you have set in ABC), or at sea level. If you choose option with "Auto" suffix, this will also be true, but at night the third line goes back to sidereal, solar and local time (as sun is below horizon, the AM and intentisty have no sense)