Moon Phase Widget displays the current phase of the moon in a small 2x2 widget. Along with an icon, it will show the name of the phase and what percentage is visible. This is calculated real time and updates itself hourly.Also, the widget will display the moon rise and set times for your current location, if your device has location information available. To conserve battery, it does not actively use GPS.
Other features: If you tap on the widget, the current month will be displayed showing the phase of the moon at midnight. You may swipe left or right on the month at a glance, and it will change to the next or previous months. This is a continuous calendar.
Limitations: Due to wobble and accuracy limitations, the rise and set times may be up to 20 mins off.