Millions of people use Signal every day for free and instantaneous communication anywhere in the world. Send and receive high-fidelity messages, participate in HD voice/video calls, and explore a growing set of new features that help you stay connected. Signal’s advanced privacy-preserving technology is always enabled, so you can focus on sharing the moments that matter with the people who matter to you.

• Say anything – State-of-the-art end-to-end encryption (powered by the open source Signal Protocol™) keeps your conversations secure. Privacy isn’t an optional mode — it’s just the way that Signal works. Every message, every call, every time.

• Go fast – Messages are delivered quickly and reliably, even on slow networks. Signal is optimized to operate in the most constrained environment possible.

• Feel free – Signal is a completely independent 501c3 nonprofit. Development is supported by users like you. No advertisements. No trackers. No kidding.

• Be yourself – You can use your existing phone number and address book to securely communicate with your friends.

• Speak up – Whether they live across town or across the ocean, Signal’s enhanced audio and video quality will make your friends and family feel closer.

• Whisper in the shadows – Switch to the dark theme if you refuse to see the light.

• Sound familiar – Choose custom alerts for each contact, or disable noises completely. Simon & Garfunkel wrote a hit song about it in 1964, and you can experience the sound of silence whenever you want by choosing “None” as your notification ringtone.

• Picture this – Use the built-in image editing features to sketch, crop, and flip your outgoing photos. There’s even a text tool so that you can add more words to the 1,000 that your picture is already worth.

For support, questions, or more information, please visit:

Source code:

Follow us on Twitter (@signalapp) and Instagram (@signal_app) for all of the latest updates and announcements.

What’s New

Version 5.5.0

• This update improves the onboarding experience for new Signal users. If you’ve already been using Signal for a long time, feel free to invite a new friend and then ask them to tell you all about it.
• We made message processing significantly faster, so you can fly through your message backlog after your flight lands, or quickly power through what you missed while you were looking for a power outlet.
• We filled in the blanks with bug fixes for stickers and delivery receipt checkmarks that weren’t always appearing for some users.

Ratings and Reviews

4.6 out of 5
43.6K Ratings

43.6K Ratings

foudoumike ,

Excellent texting app

Very good app for texting. Improved lately. Try it, you won't be disapointed.

peterwu1992111 ,

Good app

Good app

B3brown ,

Not happy...

As someone who is security minded I was extremely disappointed to see that upon accessing my contacts Signal advertised me to everyone else who had the app. No way to shut that off in any preference setting. Can you say Privacy breach? Ridiculous.

Developer Response ,

That's great to hear that many of your contacts have moved away from insecure legacy protocols and are using Signal. If you do not want your contacts to see you as a Signal user, then you will have to register for Signal with a number that you choose to only share with select people. Under normal circumstances, hiding that you're using encryption is almost impossible. It's more effective to make it more pervasive.

App Privacy

The developer, Signal Messenger, LLC, indicated that the app's privacy practices may include handling of data as described below. For more information, see the developer's privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Contact Info

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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