A feature that would be a real differentiator is allowing the user to create a smart, customized shopping list, or even having the system generate a suggested list for each user. For some people, searching for items one by one can be annoying, so having a ready-made list would be very helpful.

Then, every month or week, the system could calculate the user’s average purchases/consumption and generate a new suggestion.

In addition, the shopping suggestions could be intelligent, checking multiple stores to find the best prices and shortest delivery times, etc.