Record the drop-off
At the counter, on the phone. The customer leaves a thing and comes back on a later day.
Record the drop-off at the counter. Photo on the way in, photo when it is done. A customer who has the app can be told it is ready.
I took shoes to the shoe wash and had to go back more than once to find out if they were done. The same wait is the cobbler, the tailor, laundry, and phone repair.
A walk-in without the app is told the order was created, not that it is ready.
At the counter, on the phone. The customer leaves a thing and comes back on a later day.
Photo on the way in. Photo when it is done.
A customer who has the app can be told it is ready. Cash, and a deposit if the item is valuable.
Ready-by is a number of hours, not a day.
There is no link they can open without the app.
Nothing to hold up at the counter.
A walk-in without the app is told the order was created, not that it is ready.