If you ever wished for a genie to give you a longer life, there is now an App for that! Skyclock shows you how to get your day's worth, each and every day!
When I first saw this App I thought "So what?" but then as I started using it I rapidly discovered what a useful and rather amazing tool it was. I never thought about the daily changing skylight conditions that we take for granted. It just doesn't get light or dark at the same time every day!