A new iPhone app can help women who are pregnant or nursing safely eat seafood. A Purdue University professor created the free app called Fish4Health. It's available at iTunes and the Purdue Extension's The Education Store. The app helps women track their intake of seafood, fish oil supplements, healthy fats and mercury…as babies are the most vulnerable to mercury contamination. Based on the latest research, the app also contains information on fish species from across the country.