If you want to use it instead of WhatsApp, you can delete your WhatsApp chats by tapping 'edit' on the top-left of the chat page. That's it! Now you're up and running on Signal. You'll even see read receipts, links to send audio messages, stickers, photos and more. Once they've joined, you can start chats using the same pencil icon, or create groups, much like you would in WhatsApp.This will allow you to create an email message or text message to friends and family with a link to download the app. But you may also need to tap 'Invite Friends to Signal' if your contact doesn't have the app yet. You can start messaging people who are already using Signal.Tap the pencil icon on the top-right to create a message.Tap 'Register without Transferring.' If you've used Signal before, you can choose 'Transfer from iOS device' to download your old conversations but, for the sake of this guide, we're assuming you haven't used Signal yet.Enter in the code you received via text message.

This is so Signal can send you a text message and verify you're the one using the app.

Signal private messenger owner