Silent Phone - Secure Calling

1.87K reviews
Content rating
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About this app

Silent Phone serves as the software component of Silent Circle's Enterprise Privacy Platform of devices, software and services working together to keep you and your business safe and secure.

Silent Phone provides peer-to-peer encrypted calling, secure video, messaging and file transfers, with simple zero-touch deployment for cross-platform security—Android, Silent OS and iOS.

* 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 text 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
* Upgrade to Silent World to communicate securely with non-members

For more information on using Silent Circle across your enterprise, contact our sales team at

For additional questions or support, visit our FAQ page:

Member feedback helps us improve your experience. If you enjoy your privacy and like using Silent Phone, consider taking a minute to review the app.
Updated on
Mar 30, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Photos and videos and 2 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

1.78K reviews
Sophie Smith
August 8, 2020
Works very well. However, like all other encryption apps, you need to convince family and friends to use it. I do appreciate the encrypted calling or use the silent phone for a second line feature. The security is worth the price.
115 people found this review helpful
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Silent Circle, Inc.
February 13, 2022
We agree. Thanks for using Silent Phone to communicate securely.
A Google user
October 12, 2018
I think Mr Zimmerman is a genius. So I used his app from the beginning. I think a 3 star rating is harsh as SC pioneered secure voip. For most part continual improvement. The move out of Switzerland to U.S. is major concern to me. Also more information around silent world be awesome. Also being able to have more than phone number maybe 3 per user. I would also like a voice changer so if recorded by the party your talking to it sounds like some one totally different. Choose female or male and choose many accents even versions of accents. Make voice deeper. Also a way to detect Sting Ray's or close in monitoring equipment. Also potentially Add a VPN and brave style browser which auto wipes all surfing data after each use. Cheers guys ... I hope you like my wish list and get a laugh to, cause I am serious.
93 people found this review helpful
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Silent Circle, Inc.
March 27, 2020
Thanks for using Silent Phone to communicate securely. We love hearing your feature requests.
A Google user
February 1, 2019
my phone sends all info to another device to i researched how to fix and read this was the app that was highly recomeded on national T.V . news i downloaded, went to bed . opened next day, ACCEPT& Authorized ALL changes to start using and this is what I get when I open it, "NO DATA TO AUTHENTICATE SIP REGISTER" . WHAT THE HECK! SO I go to play store thnking i need to update, and i can not get the app to do anythng for me. i know im hacked & monitored but can they keep me from being able to use ??
72 people found this review helpful
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Silent Circle, Inc.
March 27, 2020
Sorry to hear about your experience! Please contact our team at ``. They'll solve the problem and make sure that we take great care of you.

What's new

- Enhanced call notifications on Android 12+.

Every release of Silent Phone, including this one, has important fixes and enhanced performance.