Since the latest update it's harder to add items. You now have to tap the plus whereas before this or the tick were OK. More problematic by far, though, is that just holding the phone as you go around the supermarket leads to it believing that you'd tapped items to remove them from the list, or conversely, added them from the previous items. This means it's utterly unusuable without paying full attention to it 100% of the time whilst shopping, which is impossible. It needs a safe border.