AssayFit is a software program for curve fitting and interpolation within Microsoft Excel. It can be used for a variety of purposes. The software is for research use only. You can view the pdf file of the user manual here
The software comes in three versions
1. A demo version; a completely free trial version
2. The complete and affordable full version
2. A site license with unlimited users in one organisation
With buying the software you buy a perpetual license, which means a single price with no additional yearly fees.
Linear, 4PL (four parameter logistic) like Rodbardt fitting, 5PL (5 parameter logistic), spline, point to point and second and third order polynomial regressions are included in the full version of the software. Users have the ability to add 10 custom fit functions. The software uses the least squares method for fit optimisation.
A calibration curve is fitted and unknown values are read from this calibration curve.
96-well ELISA data can be fitted using the software.
The software works as an Add-In for Microsoft Excel 2007, 2010, 2013, 2016 and office 365. It can be fully automated using VBA scripts.
A trial version is available that can be downloaded The trial version is fully functional with a 30 day time limit and only perform a linear fit, a point to point fit, and one 4PL fit. No custom functions can be added with the trial version.