Accessory created to use the step-by-step navigation function of some GPS navigation devices, in which directions for a selected route are continuously presented to the user in the form of voice prompts or visual instructions. The system keeps the user updated on the best route to the destination and is often updated based on variable factors such as traffic and road conditions. Turn-by-turn systems typically use an electronic voice to inform the user whether to turn left or right, indicating the name of the street and the distance to the next turn. To use it, download the dedicated app and connect your phone.