Every month, the app collects the data from its users and produces a report: "Dear Nestle, this month you lost $X of revenue on account of people boycotting you because of this or that."
I think it's important to send some kind of negative feedback to companies.
Maybe there are some ideas in there for you. I really wished it got completed.
If there are no customers there is no business. It doesn't matter how many 'angel investors' you have in a business or other nonsense like that. If producers try to jack up prices and nobody feels like paying them then it's the producers that go bankrupt, not the customers. Similarly if producers piss of their customers so they leave then it's the producers that lose jobs, not the customers.
This is the democratizing effect of capitalism. Everybody works for a living and everybody is somebody's customer. In a total capitalist society you must serve to be able to eat and when you eat must be served.
Of course the world is not a perfect place and there are a multitude of ways that this power dynamic gets turned on it's head.
One of the ways is people being convinced that they are passive "consumers" who believe they are helpless to 'capitalists' and apathetically volunteer themselves to be victims... Like people who go out and put 600 dollars on their credit cards on a new smart phone only to complain and moan on that smart phone on how they are being spied on and so on and so forth... while all the while paying interest to the bank for joy of financing their own privacy violation.
Edit: should throw in I actually submitted this idea for Startup School and in the early MVP ideation/building phase.