CosmoCalc 4+

Eli Rykoff

Designed for iPhone

    • 5.0 • 4 Ratings
    • Free

iPhone Screenshots


CosmoCalc is a simple cosmological distance calculator. With a simple and intuitive interface you can quickly set a reference cosmology and redshift, and CosmoCalc will calculate a full suite of astronomical distances and scales.

CosmoCalc is a useful and educational reference tool for astronomers, astronomy students, and anybody interested in calculating the distance to astronomical sources.

CosmoCalc allows you to:
* Select cosmological parameters H_0, Ω_m, and Ω_Λ with simple touch-screen controls
* Easily choose from common reference cosmologies, including Planck 2013, WMAP9, Concordance, and Einstein-deSitter
* Quickly determine the luminosity distance, angular diameter distance, lookback time, age of the Universe, comoving volume, and critical density
* Easily switch between flat and non-flat cosmologies by clicking on the chain

What’s New

Version 3.1.1

This app has been updated by Apple to display the Apple Watch app icon.

Finally updated for large screen iPhones! Other small bug fixes, Planck 2015 cosmology, and full iOS 10 compatibility, .

Ratings and Reviews

5.0 out of 5
4 Ratings

4 Ratings

Zchusre ,

Great Tool!

Never will I need to open a Jupyter notebook everytime I want to calculate some simple cosmology things!

Table crawler ,

Very educational

Very esoteric for most, but for the educated layman interested in cosmology, this a a really cool tool.
V2.2 seems to have lost the ability to unchain the total mass/energy sum. Do we have to take as fact that Omega is equal 1?

NimrodelofLothlorien ,

Useful and handy tool

A very handy and useful tool for cosmological calculations.

It would be more interesting if we can add nonzero curvature and radiation terms. Also the (as of now) hypothetical term with w=-2/3 should be added for fun.

App Privacy

The developer, Eli Rykoff, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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