How to Use Signal for Private Messages

Install and use Signal to send encrypted messages, make private calls, and share files securely.

Steps

1
Download Signal from your app store
or signal.org. The app is free for iPhone and Android with no ads or subscriptions.
2
Register your phone number
to create an account. Signal uses your existing phone number to connect you with contacts who also have the app.
3
Verify your safety numbers
with the people you message. Safety numbers confirm that your conversation is encrypted and no one else can read it.
4
Enable disappearing messages
for any chat. Tap the chat settings and select a timer from five seconds to four weeks for automatic message deletion.
5
Use incognito keyboard on your phone
so your keyboard app does not learn what you type in Signal. This setting prevents predictive text from recording your messages.

Is Signal private?Show

Yes, Signal uses end-to-end encryption by default. Even Signal cannot read your messages or see who you are talking to.

Do I need to pay for Signal?Show

No, Signal is completely free. The app is funded by donations and does not show ads or sell your data.

Can I use Signal on my computer?Show

Yes, Signal has a desktop app. Link it to your phone by scanning a QR code from the Signal desktop app.

Written by the HowToDoStuff.online editorial team. Last updated May 18, 2026.