DataFitting 1.7.56 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the program is Institute of Mathematics and Statistics.
The following version: 1.7 is the most frequently downloaded one by the program users. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
The program's installer files are generally known as CFitter1.exe or datafitting.exe etc. DataFitting lies within Education Tools, more precisely Science Tools. DataFitting was developed to work on Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10 or Windows 11 and is compatible with 32-bit systems.
From the developer:
DataFitting is a powerful statistical analysis program that performs linear and nonlinear regression analysis (i.e. curve fitting). DataFitting determines the values of parameters for an equation, whose form you specify, that cause the equation to best fit a set of data values. DataFitting can handle linear, polynomial, exponential, and general nonlinear functions.
You may want to check out more software, such as SatCalc, MathMatic or MemBrain, which might be similar to DataFitting.