diff --git a/CloudronManifest.json b/CloudronManifest.json
index 97621c7..93d346d 100644
--- a/CloudronManifest.json
+++ b/CloudronManifest.json
@@ -1,10 +1,10 @@
 {
   "id": "org.matrix.synapse",
-  "title": "Synapse: Matrix homeserver without Riot",
+  "title": "An Open network for secure, decentralized communication",
   "author": "Matrix synapse authors",
   "description": "file://DESCRIPTION.md",
   "changelog": "file://CHANGELOG",
-  "tagline": "standalone matrix server",
+  "tagline": "Matrix homeserver",
   "version": "0.4.1",
   "healthCheckPath": "/",
   "httpPort": 8008,
@@ -21,7 +21,11 @@
   "contactEmail": "support@cloudron.io",
   "icon": "logo.png",
   "tags": [
-    "im", "collaboration", "voip", "videochat"
+    "im", "collaboration", "voip", "videochat", "chat"
   ],
-  "mediaLinks": [ ]
+  "mediaLinks": [ ],
+  "changelog": "file://CHANGELOG",
+  "postInstallMessage": "file://POSTINSTALL.md",
+  "minBoxVersion": "5.1.4",
+  "documentationUrl": "https://cloudron.io/documentation/apps/synapse/"
 }
diff --git a/DESCRIPTION.md b/DESCRIPTION.md
index ee63036..9bd50a4 100644
--- a/DESCRIPTION.md
+++ b/DESCRIPTION.md
@@ -1 +1,25 @@
-Please add the appstore description in markdown format here.
\ No newline at end of file
+This app packages Synapse <upstream>1.12.3</upstream>.
+
+**This package only provides the Matrix backend. A variety of clients are available
+[here](https://matrix.org/clients/). Riot is a popular web frontend for Matrix and
+is available as a separate app.**
+
+Matrix is an ambitious new ecosystem for open federated Instant Messaging and VoIP.
+
+## Matrix
+
+Matrix specifies a set of pragmatic RESTful HTTP JSON APIs as an open standard, which handle:
+
+* Creating and managing fully distributed chat rooms with no single points of control or failure
+* Eventually-consistent cryptographically secure synchronisation of room state across a global open network of federated servers and services
+* Sending and receiving extensible messages in a room with (optional) end-to-end encryption[1]
+* Inviting, joining, leaving, kicking, banning room members
+* Managing user accounts (registration, login, logout)
+* Using 3rd Party IDs (3PIDs) such as email addresses, phone numbers, Facebook accounts to authenticate, identify and discover users on Matrix.
+* Placing 1:1 VoIP and Video calls
+
+## Synapse
+
+Synapse is a reference "homeserver" implementation of Matrix from the core development
+team at matrix.org, written in Python/Twisted.
+
diff --git a/POSTINSTALL.md b/POSTINSTALL.md
new file mode 100644
index 0000000..c807a72
--- /dev/null
+++ b/POSTINSTALL.md
@@ -0,0 +1,8 @@
+<sso>
+This app integrates with the Cloudron User Management. Cloudron users can register
+themselves using any client and use Matrix Synapse.
+</sso>
+
+**IMPORTANT: See the [docs](https://cloudron.io/documentation/apps/synapse/) on
+how to complete setup and start using this app.**
+