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CurveExpert Professional is cross-platform software for curve fitting and data analysis. The data can be designed using a toolbox of linear, nonlinear regression models, smoothing methods, or narrow strip types. More than 90 built-in models are available, but custom regression models can be user-defined. The process of finding the best fit can be automated by allowing CurveExpert to compare data to each model to select the best curve. This software is designed to produce high quality results and capture output and save time in the process.