So, if anyone has trouble with tiny typing as I do and wants to use the app to submit these shops on the road, this is what I do: At home, when prepping for the route, I create a document and type a list of the photo labels that are required in the format they want. I attach the list to an email (you could also cloud it but I don't cloud) then open my email on the phone and download my pre-typed list. Open the list then copy and paste each line on its corresponding photo right after I've captured an image.
To rename the photo (android): take the picture. Tap the review button to open the pic you just took (review button should show a tiny image of the thing you just took a picture of, maybe in the lower corner). Tap the three dots in the upper right corner. Tap details. Tap edit. Erase the numerical file name or title that is already there. Select and copy file name from the pre-printed list and paste where I have just erased the original file name. Tap save. I do this to the box before I go into the location and later to the receipt when I have come out, so I don't get them mixed up.
It's a lot of extra steps but I am sure I will not label them correctly if typing directly on the phone.