You don't go after the consumer. Consumers don't care enough and, as you said, the marketplace is glutted. Instead, sell to grocery store chains that have exis

You don't go after the consumer. Consumers don't care enough and, as you said, the marketplace is glutted. Instead, sell to grocery store chains that have existing infrastructure. In fact, you don't even build an app. Instead you offer an API that they can call when they want to implement this sort of functionality. Optionally, you offer to do the integration (though this seems like it could make for an awful headache). Make sure the docs are good and the customer service is better. The point is to give the grocery chains a value add that their competition doesn't have: a way to plan meals effectively and order all the ingredients. There are some very relevant comments elsewhere in this thread that call out waste, which is a problem I'm not sure how to solve.