Update README.md

Author: Dev-Adnani

README.md

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 # VoiceGPT-Flutter
-Just Integrated ChatGPT APi and Used Voice As A Medium To Communicate
+
+Integrated ChatGPT APi and Used Voice As A Medium To Communicate
+
+## Features
+
+- Natural language understanding
+- Human-like conversation
+- Voice Assist Feature
+- Customizable to fit your use-case
+- Open-source
+
+## Environment Variables
+
+To run this project, you will need to add the following file in app - constant folder - app.keys.dart
+
+`apiKey`
+
+- API key for OpenAI GPT-3 [Available here](https://beta.openai.com/account/api-keys)
+
+## Additionals
+
+The VoiceGPT can be further customized to fit your use-case by modifying the code in the `main.dart` file and other files. The source code for the VoiceGPT is available on GitHub.
+
+## Libraries
+
+- Main Library Used in App 
+    - provider
+    - http
+    - avatar glow
+    - speech to text
+    - lottie
+
+## Feedback
+
+If you have any feedback, please reach out to us at [email protected]
+
+## Request
+
+Show some :heart: and star the repo.
+