I just started using KitchenOwl for this. It can be a little clunky, but it suits my purposes well.
Pros:

• self hostable
• multiple grocery lists
• categories and sorting are customizable (so I can put the categories in the order I shop in)
• sync across devices near instantaneous
• web and desktop interface

Cons:

• can be a little slow to add items. You can't just add text, you have to wait until the search is complete
• does not automatically combine the same item together
• occasionally when I switch to the app and mark an item complete, it doesn't take. Only happens on the first item on open and I just click it away again, so not a huge deal.