No, the OtoZen app does not make the phone completely unusable while driving. However, it provides valuable feedback to the driver both during and after their trips. The app includes warning alerts while driving to promote safe driving habits and avoid potential dangers. Additionally, you will receive notifications about your teen's driving behavior, such as speeding and phone usage, at the end of each trip. This feedback helps encourage responsible driving practices. While the app does not render the phone completely unusable, it aims to promote safe driving and provide useful insights to support a long-term focus on road safety.