Creator here. This is a Google Sheets add-on that allows you to perform some basic arithmetic on numbers with units (like "2 lbf / in") along with automatic unit tracking, errors for mismatched units and conversions. I have always thought that this is a sorely missing part of the spreadsheet eco-system. I hope that trying it out might convince you of the same. Although this is a paid app, there is a like to a survey you can take for free lifetime access. I will be keeping this open for a few more days so if you like it (or don't) fill out the survey!