Sounds like something todoist should well be able to handle: https://todoist.com/ https://todoist.com/ They have been around for years but they really focus on

Sounds like something todoist should well be able to handle: https://todoist.com/ https://todoist.com/ They have been around for years but they really focus on being just 1 thing, a good to-do list manager. Sharing lists/tasks amongst people is as far down the collaboration rabbit hole as they went. If your use case is really just groceries there is even an app just for sharing shopping lists with others (some friends use it and like it, personally for me it felt overkill): https://www.getbring.com/en/home https://www.getbring.com/en/home