Free
About
Function curve fitting using custom function that you enter. Reads data values either from file or manual entry, and tries to fit your function to the data by adjusting 1 to 4 parameters for a least-squares best fit. For enjoyment only, NOT for serious data needs.
This is minimalist by design with no ads, no in-app purchases, no bells and whistles, and no fancy moving graphics to distract you, just fun.
Note: Entertainment value only, fun using different parameter starting values.
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What's New in Function Fitter
2.2.0
May 4, 2026
- The computed parameter values and chart are now dynamically updated during the fitting process. - Final parameter values can be used as new initial values at the click of a left arrow icon. - Manually edited input data can now be saved to a file for ease of re-use. - Improved Help text and introduction/instructions. - UI improvements.
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