Interesting! I liked the format. I love how easily you make Google sheets flip around and dance for you. I think I’m going to slowly start building up my sheets fluency after seeing what charts can do.
I think the most interesting part for me was the story you pulled out of the data. Where you connected the dots and showed how the info has supplemented the squishy fallible grey matter.
I notice your apps are only for iPhone, any plans for Android?
How about providing a template sheet with all the formulas etc set up?
Also, the radar chart looks nice, but even if animated, it might be hard to easily spot the biggest changes, given the large number of categories. Maybe a connected scatterplot could work, with one axis being the frequency of a tag, and the other axis reflecting the average rating?