Serious defect!

This would have been 5 stars except for a serious flaw. It does have the most beautiful UI you can imagine for such an app. I do a lot of serious Moon observing and I loved the fact that you could (apparently) enter any date and time and get the lunar day accurate to 1/10th of a day, However I discovered that although you can put in any date, the time always defaults to your current time. So if at 10:00 on the morning of Feb. 20th you’re planning for observing at 9:00PM that evening, it will show you the lunar day for the 20th but at 10:00 AM (even if you entered 9:00PM). For many astronomers, this flaw is so serious it’s a deal-breaker.

Andrew4549 about Lunar Phase calendar for the moon