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pro Fit comes with a spreadsheet editor for handling numeric and alphanumeric data sets of millions of rows and columns, a drawing editor for creating high quality graphs and presentations of data and functions, powerful curve fitting and data analysis tools. The application is scriptable with Apple Script, Python and Pascal, and user operations can be automatically recorded in these scripting languages.

What's New

Version 6.2.14:
  • Fixed a potential crash when closing text windows.
  • Fixed a potential crash when changing the ranges of the preview while a function is still slowly drawing itself.
  • Corrected an error that would be raised by FitExecute when trying to allocate the results object.


OS X 10.6 or later

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pro Fit User Discussion

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Iliketrash Member IconComment+206

The main problem I have with Pro Fit is the inability to import binary data. Igor Pro has a flexible and easy-to-use way to do this. I don't understand why the Pro Fit developers don't add this—it's really easy to do. They provide information on how the user can write importers for custom data formats, but this is a very hard task and should not be pushed on the user. (Veusz now provides some binary import capability although not as flexible as Igor Pro. And, as noted below, it isn't a general programming environment.)

If Pro Fit added this import capability I would buy it immediately.

A lesser complaint is that I would like to see some kind of project organization capability, where data, plots, and program files could be collected and accessed with Pro Fit in, say, a panel.

BTW, the "Similar Software" list on MacUpdate is really inappropriate as they are all graphing programs. Pro Fit is a complete programming environment (as well as graphing) with both Pascal and (now) Python. (As another commenter noted, the Python addition allows full access to NumPy and SciPy, a very big deal.)

Reply2 replies
Version 6.2.7

I have personally written a couple of binary data import plug-ins. It's not for beginners, but it isn't too hard, either. I appreciate the full flexibility that this method affords. If you are serious about importing binary data, you should have no problem writing a plug-in.

Alternatively, you could use one of the Python libraries to deal with this problem.

Markus Winter

@Germ65: "If you are serious about importing binary data, you should have no problem writing a plug-in."

That is a very snobby "answer". Sorry, but not everyone is a programmer. I know a lot of people who have a need to visualize data but very very few would be able to write a plugin. Good for you if you can write one.

Germ65 Member IconReview+19

Had to post a review for this outstanding application to counterbalance the idiot "frustrated statistician" below.

Reply0 replies
Version 6.2.0B5
zeba Member IconComment+70

How does this compare to Igor Pro lately?

Reply0 replies
Version 6.1.9
Anonymous Member IconReview

With all the features you get for $95 (what is the cost of competing packages?), its intuitiveness (how fast do new users learn Igor?), and the good stability and user-support, this is an amazing program and I can only give it maximum rating. Great value for your money, great useability, and it provides 98% of all the features you will ever need for data and function analysis purposes in a very accessible (and easily expandable) way. It is much better to get 98% of what you will ever need in a package that is so approachable that you won't forget how to use - rather than to get 99% at the cost of a complicated and difficult to learn program.

Reply0 replies
Version 6.0
Anonymous Member IconReview

Good program. But, note my ease of use and feature ratings are both high even thought I believe for many users it will be rather low. Basic graphing is on par with the old Cricket Graph 1. But, I rated features high because it is highly programmable. It is much easier to get started in that Igor Pro, but not as powerful.

People who don't read the clear instructions on the site for the difference between demos and betas shouldn't have their ratings counted.

Reply1 reply
Version 6.0b8
Anonymous Member Icon

I note that you gave a single star for stability. If you have any issues to report, please let us developers know at profit@quansoft.com.

Anonymous Member IconReview

this is NOT a demo - after sitting thru the d.l on dialup, it promts for a pw to test it. BAD BAD BAD!

Reply1 reply
Version 6.0b1
Anonymous Member Icon

No it is NOT a DEMO, it IS a BETA version that requires a v5.6.x license to use. A demo version of the CURRENT final release 5.6.6 IS available from their website. When v6.0 is no longer in BETA, I weel expect them to a the v5.6.6 DEMO replaced with a v6.0 DEMO.

It IS an EXCELLENT program, please try the DEMO. I have replaced KaliedaGraph several years ago (its development has been essentially dormant since the mid-1990's) with it and have never looked back.

Anonymous Member IconReview

I´v ebeen using pro fit for severla years now ,and it´s the perfect replacement for DeltaGraph. Granted, it doesn´t support as many chart types as DeltaGraph but is moe powerful due to its Pascal programming.

I´ve used to teach calculus as well as programming and it is one indispensable tool.

Reply1 reply
Version 5.6.4


I just started using Pro Fit and it seems good, but how do you import excel files into it without the dates changing. I am having formating troubles. I can't seem to get the proper dates and it is driving me crazy.

Thanks for any advice!!!!

user icon+0
Version 6.2.4
> 4 5


Current Version (6.x)


Downloads 41,860
Version Downloads 22,158
License Demo
Date 01 Feb 2014
Platform OS X / Intel 32
Price $95.00
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