The present work focuses on a multifunctional Arduino-based smart robotic car capable of a range of functionalities within the category of advanced control, automation, and interactivity. Wireless communication is achieved by Bluetooth, voice control through the MIT App Inventor interface, obstacle detection using ultrasonic and infrared sensors, and manual operation through a remote controller and smartphone application. The vehicle is driven by DC (BO) geared motors, controlled by an L298N motor driver connected to an Arduino UNO microcontroller. In this context, wireless communication is enabled by the use of an HC-05 Bluetooth module that allows both manual and voice-commanded navigation. The developed system with an HC-SR04 ultrasonic sensor combined with IR sensors offers obstacle avoidance capability with reliable environmental awareness. The robotic platform provides line-following and obstacle-avoiding features while remaining IR remote controllable. In this work, we demonstrate a seamless integration of hardware and software, resulting in a versatile platform for educational, research, and hobbyist applications in robotics and IoT.