Hamburger icon (upper left) > 'Weekly summary' > choose the week > three dots (upper right) > 'Share'
These reports are more or less useless. They are just screenshots of the basic weekly summary data. There does not seem to be a way to get meaningful reports without manipulating the *.csv files in excel. Thanks for pointing this out, wagrous, because I will stop using this app to monitor nutritional data and find another app.