Today’s free Amazon app is Army Survival Guide
I’m not sure of the utility of a survival manual that requires an internet connection (Amazon Apps require authentication to Amazon when you start the app) and battery power, but hey it’s free and it might come in handy.
I also have the dead tree edition
I dont have a link handy, but the Army has released all previous field manuals for public consumption. These are not the current curriculum, but they are the most recent before the official. You can find them online in pdf. Just download and file away in your phone. No connection needed…