Update README.md

Author: ndPPPhz

README.md

@@ -1,28 +1,26 @@
-# PlaneTalk
-<p align="center">
-<img src="https://user-images.githubusercontent.com/6486741/76912323-62880880-68ab-11ea-938f-15b7519726db.gif">
-</p>
+<img src="https://user-images.githubusercontent.com/6486741/115228357-8f8b9800-a109-11eb-98ca-0bd4ada84b20.png" width=100>
 
+# PlaneTalk ![](https://img.shields.io/badge/iOS-Swift-green)
 
-PlaneTalk is an iOS Swift App which lets you send messages to other devices connected to the same Wi-fi network.
-It's suitable in places like airplanes where there is no internet connection.
+PlaneTalk is an iOS app written in Swift which lets you send messages to other devices connected to the same Wi-fi-Hotspot network.
+It's suitable in places where there is no internet connection like airplanes (hence the name PlaneTalk 😃).
 
 The core functionalities are all built around some TCP and UDP's `syscall` and uses `kevent` as event notification system.
 The UDP protocol is only being used for discovery's purposes whereas the TCP protocol is being used to connect and communicate with the server.
 
+## Preview
+
+| Sample 1 | Sample 2 | Sample 3 |
+| ------------- | ------------- | ------------- |
+| <img width=150 src="https://user-images.githubusercontent.com/6486741/115229482-04130680-a10b-11eb-8c1c-e373cf2e8603.png">  | <img width=150 src="https://user-images.githubusercontent.com/6486741/115229496-07a68d80-a10b-11eb-9c07-12645ebf09c6.PNG">  | <img width=150 src="https://user-images.githubusercontent.com/6486741/115229668-391f5900-a10b-11eb-9b77-3739fe9a8480.PNG"> |
+
 ## How it works
-When a device opens the app, it automatically sends an UDP Broadcast message to detect any other device in the network. 
-After sending the message, the device may
-1) either receive another broadcast message sent from the server containing its IP 
-2) or it may not receive any message.
-
-In the 2) scenario, the device 
-- becomes the server of the communication system
-- keeps the UDP Broadcast up in order to receive broadcast messages of any new  device joining the network
-- opens a TCP socket to receive connection's requests
-- establish connections with the clients
-
-In the 1) scenario, the device then fetches the IP of the server and establish a connection with it.
+When a device launches the app, it can choose to become either the server or a client.
+
+The server is listening to UDP messages to detect clients in the network and opens a TCP socket to receive connection's requests.
+Clients instead, will broadcast UDP messages for discovery purposes.
+Once the server receives a discovery message, it broadcasts a discovery response message and then the client then connects to the server via TCP.
+
 
 ## License