This is a fantastic app. It covers a lot of material on worldwide survival. The pictures of the edible and medicinal plants are excellent.
I own the book that this book is based on but the app has tools, calculators etc. that one can use. Suffice it to say that this app is on the very top of the list as far as survival apps are concerned.
Chuck H
Chucky from San Francisco,CA USA about Survival Pocket Ref, v3.0