diff --git a/docs/index.md b/docs/index.md
index c9f4f19e5..d89fdc14f 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -20,7 +20,48 @@ Friend is an AI wearable device that records everything you say, giving you proa
 
 ## How it works
 
-The first step to world-class documentation is setting up your editing environments.
+```mermaid
+graph TD;
+   A[Device] -- Streams Audio --> B[Phone App];
+   B -- Transmits --> C[Deepgram];
+   C -- Returns Transcript --> D[Phone App];
+   D -- Saves Transcript --> E[Phone Storage];
+
+classDef lightMode fill:#FFFFFF, stroke:#333333, color:#333333;
+classDef darkMode fill:#333333, stroke:#FFFFFF, color:#FFFFFF;
+
+classDef lightModeLinks stroke:#333333;
+classDef darkModeLinks stroke:#FFFFFF;
+
+class A,B,C,D,E lightMode
+class A,B,C,D,E darkMode
+
+linkStyle 0 stroke:#FF4136, stroke-width:2px
+linkStyle 1 stroke:#1ABC9C, stroke-width:2px
+linkStyle 2 stroke:#FFCC00, stroke-width:2px
+linkStyle 3 stroke:#2ECC40, stroke-width:2px
+```
+
+## Structure
+
+There are 3 different apps in these repositories located in different branches and folders. Our goal is to merge them into one big project.
+
+Folder "AppStandalone": Standalone version of the app that doesn't require any hardware to use it.
+
+Folder "AppWithWearable": Wearable-connected version of the app that requires the "Friend necklace" to use it.
+
+Folder "AppWithWearableReactNative": Wearable-connected version of the app that is built in React native
+
+## Hardware Buying Guide (<$20 total)
+
+- Board: Seeed Studio XIAO nRF52840 Sense | $15 on [Seedstudio](https://www.seeedstudio.com/Seeed-XIAO-BLE-Sense-nRF52840-p-5253.html) and $24 on [Amazon](https://amzn.to/3TZD1pO) and also [link for europe ](https://amzn.eu/d/3eG6gaA) and [India](https://robu.in/product/seeed-studio-xiao-nrf52840-sense-tinyml-tensorflow-lite-imu-microphone-bluetooth5-0/) | <$15/unit
+
+- Rechargeable Battery on [Amazon](https://amzn.to/3TXlE9f) $7
+- Slider switch | $7 for 30+ units [on Amazon](https://www.amazon.com/Tnuocke-Vertical-Position-Latching-SS12F15-G5/dp/B099N3HFPG/ref=sr_1_2?dib=eyJ2IjoiMSJ9.vWYaZHNA7Z38_YnK7oxLKHvVPX-koqNn5CYGqZXKURCQso_zrAwckot4_h8c77Kgy2-m8FcrQymrZff0rlZIGdECJFA5Rwc5EQObrZ5wDb9zjnwVjonhSZfHlyM-KkJKO4_E6mKcC_I0vZg2vS1PBPkNSAXj9H9pTVK3D2iVtuoMNsxvAEwrYUPx3gYOiIjMOzJYoj8aHPmy2W1R4bWcPWp8IvhbO1GO29TT0jVE97U.ZavNMHkM9KYGMLSB_3DREpSJjhQ16_cjqOpo7aPAfHY&dib_tag=se&keywords=slider%2Bswitch&qid=1711332053&sr=8-2&th=1) and also [link for europe ](https://amzn.eu/d/9U0gjPB) but you only need one | <$1/unit
+
+- Wires. I didn't try [these ones ](https://www.amazon.com/dp/B09X4629C1)but they should work
+
+- 3D-print design of the case is located [here](https://github.com/BasedHardware/Friend/tree/main/assets/3d_printing_designs)