Briar Mailbox

Receive encrypted messages while Briar is offline

Briar Project · org.briarproject.mailbox

Not rated yet 10K+ downloads v1.0.9 51.3 MB Android 4.3+ PEGI 3 · Everyone

Download APK 51.3 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v1.0.9 (10009)
Updated: Jun 17, 2025 (1 year ago)
APK size: 51.3 MB
Requires: Android 4.3+ (API 18)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Communication (app)
Permissions: 8
Website: briarproject.org
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Briar Mailbox is an app by Briar Project in the Communication category. 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.

It asks for 8 permissions, none of them sensitive.

What's new in v1.0.9

* Update translations, add Lithuanian and Spanish (Cuba) * Update list of Tor bridges * Upgrade Snowflake to 2.9.1

Description

From the listing uploaded by “appupdater”.

Briar Mailbox is a helper app for Briar messenger that lets you receive encrypted messages from your contacts while Briar is offline. Next time Briar comes online it will automatically fetch the messages from your Mailbox. Install the Mailbox app on a spare device, link it with your Briar account, and leave it connected to power and Wi-Fi.

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jun 17, 2025.
Certificate issued to “Mailbox” This is the certificate of the Google Play version.

Store checks and file details

Developer signature verified Jun 17, 2025
Validated against Google Play Jun 17, 2025
Signed byCN=Mailbox
Signing certificate (SHA-1)01:86:BD:24:F0:4F:99:2D:26:26:96:4A:ED:D2:92:07:AF:2F:C3:76
File MD5e555fd5aec393c4f5f95f9d63555bfbc
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. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (8)

Briar Mailbox requests 8 permissions, none of them sensitive.

Full network access android.permission.INTERNET
Internal broadcast protection (app-defined) org.briarproject.mailbox.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Wi-Fi android.hardware.wifi

Briar Mailbox APK: questions and answers

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 Briar Mailbox 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. After downloading, check that the file's MD5 is e555fd5aec393c4f5f95f9d63555bfbc.