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Crittersim is a simulation program that runs a section of a virtual world. There are plants and animals and some semblance of natural selection going on.

This includes the most fundamental pieces for a simulation. This interactive simulation will hopefully entertain the curious.

In it you can control various characteristics such as the rate of plant seeding, apply herbicide and pesticide, and observe how various species compete for limited resources. Using an advanced editing mode you can even create your own species or modify existing ones in one fell swoop.

What's New

Version 1.3:
  • Simulation continues while menus and modal dialogs are displayed.
  • Enhanced crash reporting.


Mac OS X 10.4 or later

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Crittersim User Discussion

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Paul Dorman Member IconReview+4
Paul Dorman

I don't think the previous reviewer quite got the purpose of this little app. Although the name may be somewhat confusing, this is not a "game" type simulator. It has to do with species competition for limited resources, and whether a balance will be reached, or will they oscillate indefinitely. Do a search also for "logistic difference equation" to find out more about chaos and species competition equations.

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Version 1.1
ShotgunWeddings Member IconReview+278

Features: Lame
Ease Of Use: Lame
Value: Lame $10 for something un-finished
Stability: Who cares

But for the fact I was searching around for simulators for my nephew, I would never have even looked at this useless & pointless download.

• No age group would be interested in this garbage.
• No real graphics, just moving blobs and graphs.
• No sounds or music
• Nothing to keep anyone interested for more than 1 second.

I wouldn't download this lame excuse for a simulator ever again even if the author offered me $10 !

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Version 1.0
There are no Ratings for this App yet.
> 3 2


Current Version (1.x)


Downloads 3,093
Version Downloads 1,395
License Free
Date 31 Mar 2008
Platform OS X / PPC 32 / Intel 32
Price Free
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