Silent Phone provides encrypted voice, video, and messaging brought to you by the world leaders in privacy, Silent Circle. Calls and messages between Silent Phone members are encrypted end-to-end protecting your business from criminals and competitors alike.

- True Privacy. Trusted by businesses and governments around the world.
- Simple “zero–touch” deployment across your organization
- Remote or in-house training available
- Secure conference calling with HD call clarity
- Burn functionality protects messaging with auto self-destruct
- Voice memos offer a modern replacement for traditional, unprotected voicemail
- Securely send pdf, docx, mov, mp4, png and jpg files.
- Silent World allows communication with non-members

What's New

Version 6.4

- Add animated GIF attachment feature
- Add support for diacritic-insensitive contact search
- Continue conference audio between participants when host is on an external call
- Improve attachment upload speed
- Improve UI performance when decrypting attachments
- Fix send button not appearing correctly when forwarding a message
- Fix mistaken display of `Unknown` conversations
- Fix crash when phone receives incoming call before login

Ratings and Reviews

3.9 out of 5
31 Ratings
31 Ratings

Great app and outstanding service!

Even though I’m a fairly new customer, I have found incredible value in the service it offers. While there are many apps that offer, and likely do, provide secure encrypted communications, I haven’t found another with the phone features.

I think that many of the other apps operate under a premise that both users will have the app. But what happens when both users don’t? This is where Silent Phone offers a unique feature: a VOIP number with security built in.

I serve in the military and occasionally travel to locations outside of the US. With Silent Circle and Silent Phone as long as I have WiFi connectivity I always have one phone number to call out and receive calls. This simple feature itself is is worth every penny. The ability to call anyone, whether they’re in the Silent Circle community or not, is probably the single greatest feature for me.

Thank you, Silent Circle!

Developer Response

One4alolAll41 - thank you for that glowing review! We are glad you are enjoying the app, and thank you for your service!


App Update 6.1

Thanks For the Update It's Working Excellent! Been a Customer for Several Years I Highly Recommend the service If you want Privacy in your Communications! I travel all over the USA It works Excellent!

Developer Response

UPDATE: We removed the audio underflow tone and replaced with a visual indicator. In the next release of Silent Phone 6.1 (coming soon) you will no longer hear this tone. Again, if you are in a poor network environment you may have some delayed audio and see the Network Trouble indicator on your screen. We hope this helps your experience a bit.
Hi Oceanlite. I'm sorry that you are hearing the audio underflow tone. Its there to alert you that the connection is poor. But what you describe sounds like this is a constant occurrence. If you are connecting via wi-fi, its possible that the network isn't viable enough for VoIP traffic. I'd be happy to connect with you to trouble shoot. If you have a support ticket number, reference that in an e-mail to Thank you for taking the time to write a review. I hope we can resolve this to your satisfaction. ps we are working on a visual indicator to replace the underflow tone. Perhaps this will be a better experience for you. UPDATE: some good news. We will be working towards a solution that will allow you to control that tone. Your feedback along with others on this issue has been an integral part of our changes for future development. With that, I'd like to say "thanks" and add a few credits to your account on us. PS, let me know how things are going with the new beta.


Latest update is causing app to crash

Hi SC Dev team,
I’ve been using the app for 4.5yrs on an iPhone 5S. The most recent updates made is causing intermittent crashes when the app tries to connect to your server (red-blue- to green).


Silent Circle, LLC
53 MB
Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, German, Spanish
Age Rating
Rated 4+
© 2016 Silent Circle


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

  • Siri

    Get things done within this app using just your voice.

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