[murphyslab]

Not to cast shade, but it looks like you've essentially built a front-end for Desmos. It definitely makes things faster than trying to do it directly in Desmos.

Suggestion: Most of the fits that you've done assume that the errors are normally distributed. It would be worthwhile adding some graphical or numerical checks on that, rather than having goodness of fit or visual inspection be the only indication if this is a faulty assumption.

It gave made for a good quick check testing some data I had.