While I appreciate the data privacy stance of Cronometer immensely there are a few 'collaborative use' features that I wish I could opt into on Cronometer like the shared recipe feature that you mention. Shared exercise info would be great too! Let's say we go on a bike ride together: I can kick over the Exercise activity to your Cronometer account too. Great for parents inputting their kids info too. Not a parent but if I wanted to log my kids' nutrient intake and make sure that they were getting X minutes of sustained bike-riding, swimming, whatever each week it would be great to do some fitness activities together and then kick the activity log over to the kids profile. So as not to cause eating disorders or whatnot I obviously wouldn't make kids log their food intake. My grandmother had me do that as a (mildly chubby) child and go to TOPS with her and it was ... weird.
I ended up just using a spreadsheet as all these apps seem oddly expensive for a food log.
I’m able to send email to [email protected] without any problems. And nothing shows up in my spam folder.
It's multi-user support is... entirely non-existent. And they seem rather uninterested in feedback. I'd happily pay them for a feature where I could easily make dinner, and split it between multiple users. But no, I have to save a "recipe" (which stays in the DB forever) and then add a portion of that recipe from the other user's account.
So a family-based offering is definitely an interesting idea!