Protect your files if your phone is stolen

A thief, or someone who makes you unlock your phone, should not get your private files. Set this up once, before anything happens.

07Guide

Steps

In Settings, open Privacy and security and set Lock after leaving to Instantly or a short time. On Android, every vault also locks when the screen turns off.
Keep private files in a vault with its own password, not in your home vault. The home vault opens with a tap on your own phone, so only the phone's screen lock guards it.
Give each vault a cloud copy, so a lost phone does not lose the files. On Android: Phone copy and cloud.
Write each vault's recovery key on paper and keep it away from the phone.
If the phone is gone, sign in on another device, open Signed in in Settings, and sign the lost phone out.

Vaults open only with a password or a recovery key, never with a fingerprint or a face, so nobody can unlock one by holding the phone up to you.
On Android, screenshots, screen recordings and the recent-apps view show a blank screen.
For files that must not be found on the phone at all, see Keep a vault off your phone.
What Ciphroh does not protect against is on the security page.