Not quite an app, but rather a set of routines for crunching and munching the data (... 12 words...), as per analyses performed by science institute of kombinat, mostly on products and/or ingredients in LebarProm over several years. There were several tables (times four, as four metals were tracked) in several shapes. Did some of the work on the atarist in 1988 (before getting to know fox and having a regular PC at home), mostly data entry in some kind of lotus 1-2-3 clone, then eventually ported that into dbfs and continued in fox. The end result was a text with lots of tables and graphs, put together in ventura.
The app itself was supposed to use the many data we had on food ingredients and calculate one's diet, going into recipes recursively (IOW if it contained mayonnaise, it would break it into oil and eggs and use their compositions, add them up and calculate the daily from there).
Never finished. It was too complicated for then DBA's framework. By the time I wrote my own, it became moot. She didn't believe in diets and calculations anymore, and her specialization was likewise irrelevant.