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diff --git a/docs/source/app_architecture.rst b/docs/source/app_architecture.rst
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+++ b/docs/source/app_architecture.rst
@@ -0,0 +1,52 @@
+.. _TeleMesh App Architecture:
+.. _Room: https://developer.android.com/topic/libraries/architecture/room
+.. _RxJava: https://www.toptal.com/android/functional-reactive-android-rxjava
+.. _SQL: https://www.khanacademy.org/computing/computer-programming/sql-documentation
+
+TeleMesh App Architecture
+-------------------------
+
+We can use the ``Message Module`` to explain this App architecture.
+
+1. In case of an Outgoing message, a message data will be sent from ``ChatActivity`` to
+the ``ChatViewModel`` directly.
+
+2. Then the message data will be saved in ``MessageSourceData`` .
+
+3. We are using `Room`_ for storing data. As Room operate in background thread that’s why the message data will
+be sent using `RxJava`_. Because it manages both background and foreground
+task smoothly. All messages will be stored in the Message Table. All `SQL`_
+is executed in MessageDao.
+
+4. In the next step, message data will be sent to **Communication Layer**.
+The ``Source`` will get the message from **MessageDao** as **RxJava observer** is
+attached to it. Automatically ``RmDataHelper`` will get the message data
+because **RxJava(Flowable)** is being used for getting last inserted data.
+
+5. ``RmDataHelper`` will send the message to MeshDataSource and this will
+prepare this message data into JSON data to pass via the Mesh Network.
+
+6. In the case of an Incoming message, when any message will be available
+in this network, it will be discovered in the application’s
+Communication Layer. ``MeshDataSource`` will receive this message data and
+send to ``RmDataHelper`` directly. ``Source`` will receive the data from
+``RmDataHelper``. Now message data will be saved in Message table using
+MessageDao.
+
+7. Now, View Layer will get the event of the message data.
+``MessageSourceData`` will get the message data from MessageDao as **RxJava observer**
+is attached to it. To show message in view level, the message
+data will be provided to ``ChatViewModel`` automatically using
+**RxJava(Flowable)**. After that, message will be seen in UI i.e.:
+ChatActivity, through LiveData.
+
+8. ``RMDataHelper`` is directly connected with ``NotificationUtil``. When any data
+is available to RMDataHelper, notification will be triggered as per
+app’s requirements.
+
+
+
+.. figure:: app_architecture.png
+   :scale: 50 %
+   :alt: map to buried treasure
+
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 33410278..8157c564 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -44,8 +44,10 @@
     'sphinx.ext.coverage',
     'sphinx.ext.mathjax',
     'sphinx.ext.ifconfig',
+    'sphinx.ext.autosectionlabel',
     'sphinx.ext.viewcode',
 ]
+autosectionlabel_prefix_document = True
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['ntemplates']
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 9ba58197..b6862f34 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -3,6 +3,8 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
+.. _app_architecture:
+
 Project Overview
 ----------------
 
@@ -141,10 +143,8 @@ Minimum API: 19 (KitKat - 4.4.x)
 Development Guideline
 ---------------------
 
-Please follow this link
-https://docs.google.com/document/d/1W8joisx_mD6Rpa5aS-2hU16V2bgQ92V4VJDg_2tmlsE/edit?usp=sharing
-to get an overview of telemesh app architecture and how the specific
-module should be designed.
+Hey, read the `App Architecture`_ section.
+
 
 Developers Guideline step by step
 ---------------------------------
@@ -451,4 +451,6 @@ our community manager through [media@telemesh.net] & [info@telemesh.net]
 
 .. _Contributing Guideline: https://github.com/w3-engineers/telemesh/blob/master/CONTRIBUTING.md
 .. _here: https://github.com/w3-engineers/telemesh/blob/master/CONTRIBUTING.md#reportissue
+.. _App Architecture: app_architecture.rst
+