Moon phases application enables you to see current phase of the moon and browse phases by day with swiping finger across the screen. It also include a exposure calculator for photographing the Moon. It will give you the estimated shutter speed required based on your ISO, aperture, weather condition, moon location and phase. You can also use month view to see moon phases over the entire month and quickly move to specific day with taping it. Moon phases also include some nice widgets to use at your home screen so that can always know what is current Moon phase.
If you have any suggestions yourself, you can send them to me.