diff --git a/metadata/org.briarproject.briar.android.yml b/metadata/org.briarproject.briar.android.yml
index 94ce0d8f84..09c975702c 100644
--- a/metadata/org.briarproject.briar.android.yml
+++ b/metadata/org.briarproject.briar.android.yml
@@ -13,13 +13,13 @@ Bitcoin: 1NZCKkUCtJV2U2Y9hDb9uq8S7ksFCFGR6K
 
 AutoName: Briar
 Description: |-
-  Briar is a messaging app designed for activists, journalists, and anyone else
-  who needs a safe, easy and robust way to communicate. Unlike traditional
-  messaging tools such as email, Twitter or Telegram, Briar doesn't rely on a
-  central server - messages are synchronized directly between the users' devices.
-  If the Internet's down, Briar can sync via Bluetooth or Wi-Fi, keeping the
-  information flowing in a crisis. If the Internet's up, Briar can sync via the
-  Tor network, protecting users and their relationships from surveillance.
+  Briar is a messaging app designed for activists, journalists, and anyone else who needs a safe, easy and robust way to communicate.
+
+  Unlike traditional messaging apps, Briar doesn't rely on a central server - messages are synchronized directly between the users' devices.
+
+  If the internet's down, Briar can sync via Bluetooth or Wi-Fi, keeping the information flowing in a crisis. If the internet's up, Briar can sync via the Tor network, protecting users and their relationships from surveillance.
+
+  You can link Briar with a device running Briar Mailbox (even on Android: https://f-droid.org/packages/org.briarproject.mailbox/) to receive encrypted messages from your contacts while Briar is offline.
 
 RepoType: git
 Repo: https://code.briarproject.org/briar/briar.git
diff --git a/metadata/org.briarproject.briar.android/en-US/summary.txt b/metadata/org.briarproject.briar.android/en-US/summary.txt
index 2710d16b0c..6d62692329 100644
--- a/metadata/org.briarproject.briar.android/en-US/summary.txt
+++ b/metadata/org.briarproject.briar.android/en-US/summary.txt
@@ -1 +1 @@
-Secure Messaging, Anywhere
+Secure messaging, anywhere
diff --git a/metadata/org.briarproject.mailbox.yml b/metadata/org.briarproject.mailbox.yml
index 46d1a4b079..22629da048 100644
--- a/metadata/org.briarproject.mailbox.yml
+++ b/metadata/org.briarproject.mailbox.yml
@@ -12,6 +12,12 @@ Liberapay: Briar
 Bitcoin: 1NZCKkUCtJV2U2Y9hDb9uq8S7ksFCFGR6K
 
 AutoName: Briar Mailbox
+Description: |-
+  Briar Mailbox is a helper app for Briar messenger (https://f-droid.org/packages/org.briarproject.briar.android/) 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.
 
 RepoType: git
 Repo: https://code.briarproject.org/briar/briar-mailbox.git
diff --git a/metadata/org.briarproject.mailbox/en-US/summary.txt b/metadata/org.briarproject.mailbox/en-US/summary.txt
new file mode 100644
index 0000000000..5f472ccb5f
--- /dev/null
+++ b/metadata/org.briarproject.mailbox/en-US/summary.txt
@@ -0,0 +1 @@
+Receive encrypted messages while Briar is offline
\ No newline at end of file