Fast and easy
Gives you sun and moon phases, rising & setting, and other data -- it would be good if those other data were explained in app instead of making me google all of them. Also, I would like to select my location manually (b/c I have Location Services disabled) and perhaps have multiple locations. Also, it updates in the background once a minute, which uses battery. Updating frequency should be a user option. In fact, there are no user options at all. It is what it is, and its free.
Aztai about
Luna Solaria