Moontool for Windows

Name: Moontool
Rating: 3.1 (9 reviews)
Author: Hörstemeier

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Used Moontool for Windows?

Editors’ Review

Download.com staffFebruary 26, 2026

This application precisely calculates the current moon phase and a variety of other astronomical data. It also determines important moon-related holidays.

Top Recommended Alternative

Varactor Diode

Free

Pros
- Calculates current moon phase accurately.
- Provides sun and moon distance.
- Includes rise and set times.
- Determines equinoxes and solstices.
- Calculates moon-related holidays.
Cons
- Source code only available.
- Limited to astronomical data.

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Full Specifications

GENERAL

Release: January 31, 2002

Latest update: February 26, 2026

Version: 2.0

OPERATING SYSTEMS

Platform: Windows

Operating System

Windows 2000
Windows XP
Windows ME
Windows 95
Windows 10
Windows NT
Windows 98

Additional Requirements: Windows 95/98/Me/NT/2000/XP

POPULARITY

Total Downloads: 15,269

Downloads Last Week: 1

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Last Updated

User Reviews

3.1/5

9 User Votes

Not so good after all. Not worked as expected..
olorouDecember 20, 2010
Pros
Interesting tool. Attractive description.
Cons
Would not run under Windows 7.
Summary
Would not run under Windows 7.
Bad!!!!!!!!!!!!!!
ku215March 8, 2010
Pros
It show the moon
Cons
It don't say the phases
Summary
Another waste of time
nmweathermanNovember 14, 2009
Pros
None.......
Cons
Wouldn't install
Summary
Never got to use this...it wasted my time by refusing to install. Oh, it seemed to unzip everything then when I went to install it all I got was a window with "General file transfer error number 2." Got rid of it pronto and moved on.
Minimal -- but it's free and will do
Cybercrone1February 15, 2009
Pros
Shows a chart with times and dates of phases, world time, and a few other things.
Cons
I don't expect much of free software, but I did expect a better graphic of the moon. This one is small and not at all attractive. It conveys the phase graphically and that's all.
Summary
If all you want is the times and dates of phases of the moon, you can get that info for free with this program, shown in a chart. As already noted the graphic of the moon is downright pitiful and if that's important to you, look elsewhere. The program does work fine for what it does.
Very Technical, but interesting!
February 15, 2004
Pros
Cons
Summary
Hard to understand if new to it, but it is a wonderful program once you get to know it!!! LOVE IT!
It's a day only and not a monthly calendar
January 2, 2004
Pros
Cons
Summary
This was easy to install. However, it is not a full blown calendar of any sort. While it is interesting to watch the minutes tick by for the moon's phases, I was hoping on a 'calendar' calendar. For anyone though who has an interest of the cycle of the moon, this is an excellent program.
Horable
February 22, 2003
Pros
Cons
Summary
Comprehensive moon database!
February 1, 2002
Pros
Cons
Summary
Well done program
Nice little program
January 30, 2002
Pros
Cons
Summary

Developer’s Description

By Hörstemeier

Calculate the current moon phase together with other astronomical data.

Calculates the current moon phase together with several other astronomical data, like the distance of the sun and the moon, the rise and set, equinixes and solstices, eclipses. Also calculates moon-related holidays like easter, pesach, chinese new year. Full source code (Delphi) available at webpage.

Moontool for Windows

Editors’ Review

Top Recommended Alternative

Varactor Diode

Pros

Cons