From the little I talked with blind people, I think this could be a great solution for shopping. People I talked with said that crossing streets or moving around ain't big problem for them, but one of their biggest pain points are grocery stores. More and more, Mom&Pop stores are replaced by network supermarkets, in which you need to search for the product yourself instead of asking for it, and employees are often not prepared/willing to help a blind customer. This app could help a lot here.