My apologies that using available technology to improve upon suboptimal solutions disgusts you. In case it helps to know why "that screen" improves upon paper in the first place:

- I'm not always home when I decide to want to buy something, so then I couldn't write it on that paper

- We go shopping together most of the time. That screen lets you check items off and sync that to the other person's that screen. Alternatively, there is a mode where it gives each participant a subset of the items so you don't get duplicate things

- That screen can give you the list in the right order if you just tell the app one time what layout a store has (e.g. first the bread and breakfast things, then the cooling section, then the freezer section.. those sorts of categories)

- That screen can also work with a map function where it does a traveling salesperson problem to find a good path to walk down to get each item, but this requires entering the location of everything rather than just having everything broadly categorized

- That screen suggests things you frequently buy, so it's one tap for what you commonly need

- That screen can temporarily hide items you are going to get in the next store, so you can glance and see that the list is clear and you're good to go check out and then unhide the things when you enter the next store

- That screen can automatically add items from recipes you've added

- You have that screen anyway. The pen and paper, on the other hand, are consumables

We could forego all these benefits for, eh, not being "glued", whatever the advantage in that is. It's not like I'm getting distracted by notifications in the store if that's what you're worried about