Would be useful, but switching lists does not work (even though desired list is "checked" under "lists" button. Strangely, switch can be forced if "category" view is toggled on & off. Sometimes, after switch, the right list items are displayed under the name of another list. Hoping problems are related to iOS update (we are using 9.02), and will be fixed soon.
WL2PWR about Shoppylist: Grocery List