Survival Guide puts the complete U.S. Army survival manual, FM 21-76 (June 1992), on your phone. Everything is stored in the app, so it works without a connection: in the backcountry, at sea or wherever you lose signal.

What's inside
• 19 chapters: psychology of survival, survival planning and kits, basic survival medicine, shelters, water procurement, firecraft, food procurement, survival use of plants, poisonous plants, dangerous animals, field-expedient weapons and tools, desert, tropical, cold weather and sea survival, water crossings, direction finding and signaling
• 8 appendices: survival kits, edible and medicinal plants, poisonous plants, dangerous insects and arachnids, venomous snakes and lizards, dangerous fish and mollusks, ropes and knots, and clouds as weather signs
• The manual's illustrations, tables and plant photos
• Pinch to zoom in on text and figures

Source
The content is the U.S. Army field manual FM 21-76, Survival (June 1992), a U.S. government publication in the public domain. You can read the original here:
https://archive.org/details/MCRP_3-02F_FM_21-76_Survival
The Army has since replaced this manual with newer publications, so some advice, especially on medicine, may be out of date.

Disclaimer
Survival Guide is an independent app by SusaSoftX. It is not affiliated with, endorsed by or an official product of the U.S. Army, the U.S. Department of Defense or any government agency.

The app shows a small banner ad. Privacy policy: https://susasoftx.github.io/privacy-policy.html