https://theprepared.com/everyday-carry/reviews/mobile-apps/

Best survival apps for your phone
 UPDATED 4 WEEKS AGOBY GIDEON PARKER

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Your phone / mobile device is one of the few things you’re almost guaranteed to have nearby in an emergency. This list covers third-party apps worth downloading and lesser-known features built into Android and iOS phones.

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• Citizen (iOS, Android, free) is a crowdsourced incident alert system. If you or others see something such as a fire, police interaction, or terrorist attack, spread the word or even livestream video to notify other app users.

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• Signal (iOS, Android, free) is an all-in-one app for text, voice, and video. SMS text messages (ie. normal/classic texting) are terribly insecure, and most other apps like Telegram and WhatsApp aren’t much better. Signal is the trusted, encrypted king endorsed by security experts like Bruce Schneier and Edward Snowden.

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And, of course, I recommend what3words to give you a very precise location description.

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