excluding days on report
For the reports you that are creating from crunching numbers over a time period, you already have it so that only non-empty days are included. It would be good if you can set a threshold for the number of calories to be met for the day to be included in aggregate calculations. If the threshold is not met, the day is ignored, and not used to determine averages.
For instance, I was recently on vacation and did not log my food because I didn't think my estimates as to their macros would be reliable. But I did log other things, such as various biometrics. And I did log taking vitamins and supplements, just for my records. These would add a negligible amount of calories. I would want these days to be excluded from my reports, since I basically am not adding most things to the diary.