Silent Phone provides enterprise-grade encrypted voice, video, and messaging. Our end-to-end security protects your business, its reputation, and its valuable intellectual property from spying eyes. With Silent Phone, your team can discuss important matters across continents with the same confidence as if you were all in the same room. Silent Phone is developed by Silent Circle, the world leader in enterprise privacy solutions.


- Privacy and security trusted by businesses and governments around the world
- Simple "zero-touch" deployment across your organization
- Integrated enterprise user management with Silent Manager
- Secure voice and video calls with our unique Security Words
- Secure high-definition conference calling and group messaging
- Burn commands destroy all copies of sent messages
- Burn timers automatically redact old messages
- Voice memos speed communication and replace insecure voicemail
- Read receipts and delivery receipts give your teams situational awareness
- Securely send documents, videos, images, and other files
- Silent World offers calling to/from traditional phone numbers with enhanced security
- Standards-compliant Single Sign-On (SSO)
- Scheduled training available for your teams

What’s New

Version 6.9.3

- Fix bugs

Ratings and Reviews

3.8 out of 5
48 Ratings

48 Ratings

One4allAll41 ,

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!

urmouthsTrouble ,

iOS 13.1.2 caused issues

The app was great been using for a week now and today it’s not showing full text of what I write it only shows the first line of about 5 words then it’s blinded . Please fix

Update! Thanks for the update version. If anybody dealing with the new iOS update and having issues with calls or texts showing full screen when writing text . Silent Circle new update fixed my issue I had with mine not working so I bump there customer service up to five stars as to fixing it fast! Thanks again to silent Circle Services.

Developer Response ,

Thanks for testing our update and reporting back. Sometimes problems do come up with new iOS versions, but we'll always have an update out quickly to make things better. If you ever do see something wrong with Silent Phone, be sure to contact our highly-skilled customer support team. They'll make sure that our engineers know about any problems and will keep you fully informed.

Oceanelite ,

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. 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.


Silent Circle, LLC
54.4 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, German, Spanish

Age Rating


  • 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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