ChiSquareDiff 1.0.0.3.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The program lies within Education Tools, more precisely Teaching Tools. This free Mac app is an intellectual property of Marley Watkins.
From the developer:
ChiSquareDiff is a standalone Macintosh program designed to compute the statistical significance of chi-square difference tests as typically used in comparisons of nested SEM models in EQS, LISREL, and Mplus SEM software programs as per Bryant and Satorra.
You may want to check out more Mac applications, such as PianoRoll, eduMap or FRS Money Math, which might be related to ChiSquareDiff.