For loads more digital and physical security manuals and advice (from using TOR to dealing with physical surveillance) that work offline on your phone, we launched an open source app called Umbrella to make it a bit easier.

-https://play.google.com/store/apps/details?id=org.secfirst.u...

-https://www.amazon.com/Security-First-Umbrella-made-easy/dp/...

-https://secfirst.org/fdroid/repo

-Code and Content - https://github.com/securityfirst/

-Code audit - https://secfirst.org/blog.html

-More info - https://secfirst.org

Ends blatant plug :)