Is there a comprehensive app of all foods that are safe to eat when pregnant, and those that arent?

Many apps. Try "pregnancy companion" - it's put out by a couple of board certified ob/gyns & my patients like it. I give my patients the book "what to expect when expecting" & they tell me that it's also pretty good. Acog also has a website that makes "info" sheets available & as always, i'm sure you're OB provider is an excellent resource for any questions you may have. Good luck.