I built a spreadsheet for modeling uncertainty directly in cells.
Cells can contain probability distributions, ranges, or distributions inferred from confidence intervals. Formulas then propagate that uncertainty through the sheet.
For example:
A1 = N.CI(10, 20)
B1 = U(2, 5)
C1 = A1 * B1
Instead of a single value, C1 becomes a sampled result.
The formula engine is powered by GaussFormula, a modification of HyperFormula that supports uncertain cells and sampled calculations.
The app is early and under active development and I would appreciate some feedback.