The program is based on several books used as sources:

1. Calculations of the lunar days, exactly moonrise, produced by the formulas given in the book by Jean Mius "Astronomical Algorithms" ( "Astronomical Algorithms" by Jean Meeus 1999)

2. Description of the lunar days of shows Sergey Alekseevich Vronsky's book, "Tom4. Planetology, Part I. The Sun and the Moon"

With this program you will always have on hand:

    - a brief description of the lunar day
    - the start time of the lunar day *
    - time of the lunar day *
    - the progress bar of the current day

* The time is calculated based on your location. Formula calculations are taken from the book Astronomical Algorithms, 1999 2nd edition, by Jean Meeus.
After starting the program, you see the current day.
    To view information about other days, use gestures "left / right" or pop-up menu on the left.
Use the menu key (the hardware or in the upper-right corner) to get to the additional sections of the program, such as "Help", "alert".
We hope that the program will help you in life. Good luck.