I would like an application which will accept the name and location of a restaurant and present the customer reviews which have something negative to say about the bill/check. Either it took a long time to get the bill or the bill amount was wrong, etc... Maybe just presenting all the reviews as they appear on Yelp with the identified keywords highlighted. Great would be a button that jumps to the next set of identified keywords.
The subroutine that identifies negative check reviews should be easily modified as we learn other words to key on. Source code to be provided.