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  • #: 221030
  • Price: free ($0.00) In Apple Store
  • Category: Utilities
  • Updated: 2009-05-30
  • Current Version: 1.0
  • 1.0
  • Size: 0.20 MB
  • Language: English, Spanish
  • Seller: Javier Nieto Centeno
  • Requirements: Compatible with iPhone, iPod touch (2nd generation), iPod touch (3rd generation), iPod touch (4th generation), and iPad. Requires iOS 2.2.1 or later
  • © Javier Nieto
  •  Add to Favorite apps



As a handy tool for the telescope user, we present this iPhone calculator, which will compute the values of a number of paramaters for any telescope & eyepiece combinations you enter.

It starts off with some basic information every telescope user should know for their equipment, and continues into some more complex calculations.

-Magnification, true field, field transit time.

-Exit pupil, equivalences between telescope and your eyes

-Max. resolution, limit magnitude, Dawes limit

-Optimun magnification range, Airy disk, etc...

Developed for Astro Henares and based on the Naperville Astronomical Assication Telescope Calculator.

iPhone Screenshots

AstroCalc iPhone Screenshot 1

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Rated 3/5 based on 3 customer reviews.


5/5 stars


This is app is great - hopefully all of the information is true :)
Now I'm wondering why it has low ratings? Maybe because the people who download this app doesn't understand how to use it or doesn't have sophisticated equipment..?

5/5 stars

Very Helpful!

This is one of my most used telescope apps. Just wish the developers would continue improving and working on it as it could easily become an app amateur astronomers would gladly pay for.

0/5 stars

Limited Usefulness

Why limit this app to the iPod touch 2G? The first gen touch could run it just fine.
Built-in gear is a bad idea. Let users enter the data for their own equipment without having to scroll through a bunch of irrelevant stuff.


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The information may be outdated (2011-04-27 23:11:33). For actual information go to iTunes

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