Silent Phone - Secure Calling

Privacy-focused secure calling, video, conferencing, messaging, and attachments

Silent Circle · com.silentcircle.silentphone

2.2 out of 5 (5 ratings) 500K+ downloads v6.15.1 21.7 MB Android 5.0+ PEGI 3 · Everyone

Download APK 21.7 MB All versions

Signature matches the Google Play version Details

Watch the Silent Phone - Secure Calling trailer on YouTube

Silent Phone - Secure Calling screenshot 1

Silent Phone - Secure Calling screenshot 2

Silent Phone - Secure Calling screenshot 3

Silent Phone - Secure Calling screenshot 4

Silent Phone - Secure Calling screenshot 5

At a glance

Latest version: v6.15.1 (453067568)
Updated: May 14, 2026 (5 months ago)
APK size: 21.7 MB
Requires: Android 5.0+ (API 21)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Communication (app)
Listed since: Jan 22, 2021 (at least)
Permissions: 39 (9 sensitive)
Website: silentcircle.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Silent Phone - Secure Calling is an app by Silent Circle in the Communication category, listed since at least January 2021. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 6.14.7, the minimum Android version rose from 4.4 to 5.0. It asks for 39 permissions, 9 of them sensitive, including precise location, camera and record audio. It asks for the same permissions as version 6.15.

Ratings

2.2out of 55 ratings

5 ★0%
4 ★0%
3 ★60%
2 ★0%
1 ★40%

Ratings from users of the source store — not collected or verified by AAPKs.

What's new in v6.15.1

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

Description

From the listing uploaded by “appupdater”.

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. Features: * 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 https://www.silentcircle.com/contact-sales/ For additional questions or support, visit our FAQ page: https://support.silentcircle.com/ 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.

Version history

4 versions are listed, going back to v6.14.7. Since v6.14.10 it requires Android 5.0+.

v6.15.1 LATEST May 14, 2026 21.7 MB TRUSTED v6.15 Sep 6, 2025 21.6 MB TRUSTED v6.14.10 Feb 9, 2025 20.8 MB TRUSTED v6.14.7 Mar 23, 2024 22.4 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on May 14, 2026.
Certificate issued to “Silent Circle LLC” This is the certificate of the Google Play version.
Same certificate as the 3 other versions checked

Store checks and file details

Developer signature verified May 14, 2026
Validated against Google Play May 14, 2026
Signed byCN=Janis Narbuts, OU=SilentPhone, O=Silent Circle LLC, L=National Harbor, ST=Maryland, C=US
Signing certificate (SHA-1)2B:56:BA:64:CB:9E:49:6B:C0:7B:1B:D3:24:9A:D0:05:4D:79:00:B4
File MD55638efe27a39d7e7da6a6bd458c859f2
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (3 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (39)

Silent Phone - Secure Calling requests 39 permissions, 9 of them sensitive.

Approximate location Sensitive android.permission.ACCESS_COARSE_LOCATION
Bluetooth connect Sensitive android.permission.BLUETOOTH_CONNECT
Camera Sensitive android.permission.CAMERA
Find accounts on the device Sensitive android.permission.GET_ACCOUNTS
Precise location Sensitive android.permission.ACCESS_FINE_LOCATION
Read contacts Sensitive android.permission.READ_CONTACTS
Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
Record audio (microphone) Sensitive android.permission.RECORD_AUDIO
Write contacts Sensitive android.permission.WRITE_CONTACTS
Access notification policy android.permission.ACCESS_NOTIFICATION_POLICY
Add home-screen shortcuts com.android.launcher.permission.INSTALL_SHORTCUT
Authenticate accounts android.permission.AUTHENTICATE_ACCOUNTS
Control vibration android.permission.VIBRATE
Disable keyguard android.permission.DISABLE_KEYGUARD
Foreground service data sync android.permission.FOREGROUND_SERVICE_DATA_SYNC
Foreground service microphone android.permission.FOREGROUND_SERVICE_MICROPHONE
Foreground service remote messaging android.permission.FOREGROUND_SERVICE_REMOTE_MESSAGING
Full network access android.permission.INTERNET
Internal broadcast protection (app-defined) com.silentcircle.silentphone.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Keymngr read sc key (custom) com.silentcircle.keymngr.permission.READ_SC_KEY
Keymngr write sc key (custom) com.silentcircle.keymngr.permission.WRITE_SC_KEY
Manage accounts android.permission.MANAGE_ACCOUNTS
Modify audio settings android.permission.MODIFY_AUDIO_SETTINGS
Prevent the device from sleeping android.permission.WAKE_LOCK
Push messaging (app-defined) com.silentcircle.silentphone.permission.C2D_MESSAGE
Read sync settings android.permission.READ_SYNC_SETTINGS
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Request ignore battery optimizations android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
Schedule exact alarms android.permission.SCHEDULE_EXACT_ALARM
Show notifications android.permission.POST_NOTIFICATIONS
Silentcontacts read (custom) com.silentcircle.silentcontacts.permission.READ
Silentcontacts write (custom) com.silentcircle.silentcontacts.permission.WRITE
Use credentials android.permission.USE_CREDENTIALS
Use fingerprint hardware android.permission.USE_FINGERPRINT
Use full screen intent android.permission.USE_FULL_SCREEN_INTENT
View network connections android.permission.ACCESS_NETWORK_STATE
Write sync settings android.permission.WRITE_SYNC_SETTINGS

Required hardware & features

Bluetooth android.hardware.bluetooth
Basic touch input android.hardware.faketouch
Location android.hardware.location
Microphone android.hardware.microphone
Portrait screen android.hardware.screen.portrait

Silent Phone - Secure Calling APK: questions and answers

Is there a version of Silent Phone - Secure Calling for older Android phones?

The current version needs Android 5.0 or later. Version 6.14.7 is the newest listed build that installs on Android 4.4 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 6.14.7 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Silent Phone - Secure Calling APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 3 other versions checked. After downloading, check that the file's MD5 is 5638efe27a39d7e7da6a6bd458c859f2.