Offline Android Smartphone Assistant is a virtual personal assistant which is implemented to perform basic functionalities of the smartphone in offline mode with speech commands. The task includes open apps, toggle wi-fi, toggle Bluetooth, call a person, send messages, control brightness, open torch, etc. The key functionality of the Offline Android Smartphone Assistant is the capability of performing each and every task without the use of the internet. The users can interact with the assistant through natural voice commands. Many companies had established several virtual assistants like Google Assistant, Apple’s Siri, Amazon Alexa, etc. However, the virtual assistants established by several companies do not provide many offline functionalities. In this proposal, we provide easy to access every system functionality without using the internet using Speech Recognition. This application will help people in areas where internet connectivity is hardly possible. The application also provides the functionality of a screen overlay. The application uses Natural Language Processing for processing the voice commands and performing the required tasks.