Did you read the article in the link? The bit about the app (which is not shit) I put in there so people can know what to buy that is not damaging to marine environment . It's to help people know what seafood is sustainably caught or grown, rather than buy what is not so as to not deplete the oceans of endangered species more than it already is. It also helps you know if farmed fish come from polluting businesses. It's not an app you pay for. It's an app you can use if you also care about what industrial fishing practices are doing to marine life. If you want to know more check the Australian Marine Conservation Society.