In that sense, the wall scanning is a bit of a gimmick; the critical thing is to remember you want/need to buy something.
This is the big thing. I work for an online grocery shopping startup, and when speaking to lapsed customers the biggest answer we get as to why they've stopped shopping with us is that they forgot we exist and went to the supermarket instead. Breaking people's habits is a hugely difficult thing, but vital in a sector where most people's first thought is to go to drop into Tesco on the way home from work.
This is the big thing. I work for an online grocery shopping startup, and when speaking to lapsed customers the biggest answer we get as to why they've stopped shopping with us is that they forgot we exist and went to the supermarket instead. Breaking people's habits is a hugely difficult thing, but vital in a sector where most people's first thought is to go to drop into Tesco on the way home from work.