There seem to have been a numbers of surveys of this, most citing Pew research, but I couldn't actually find a pew study to confirm it. I did find thus study th

There seem to have been a numbers of surveys of this, most citing Pew research, but I couldn't actually find a pew study to confirm it. I did find thus study that was a survey of grocery users: https://www.supermarketnews.com/consumer-trends/nine-10-grocery-shoppers-use-smartphone-store https://www.supermarketnews.com/consumer-trends/nine-10-groc... It shows 89% of those survey use the phone in the grocery store. Separately pew estimates 81% smartphone ownership rates in the US. https://www.pewresearch.org/internet/fact-sheet/mobile/ https://www.pewresearch.org/internet/fact-sheet/mobile/