What Is Signal? Signal is a messaging app, just like WhatsApp or iMessage or Facebook Messenger, but one that's geared toward privacy and security rather than cute emoji stickers.

The Signal messaging app uses end-to-end encryption so that your texts, calls, videos, files, and location remain private. Here's how to use it.

Downloading and setting up Signal The first step, of course, is to download the Signal app on your iPhone or Android device via the Apple App Store or Google Play.

You can make Signal as your Default SMS Messaging App on Android phone. You can switch between standard text and secure message.

Signal is Edward Snowden's messaging app of choice. REUTERS/Charles Platiau After a nasty year of hacks and leaks, it's only natural to wonder how you can keep your own digital communication private.

Signal private messenger app is a favorite of government officials, tech giants, and cyber experts. Find out why.

Changing the color appearance of Signal messenger app in your Android phone Although Signal is a security focused app it also has features that allow you to customize its appearance.