A user device may be used to prevent a user from driving a vehicle while distracted by the user device. The user device may create a user profile, determine whether the user is driving, and collect usage data while the user is driving. The user profile may include information regarding the driver's propensity to be distracted while driving and the usage data may include information on whether the user is actually distracted by the user device. The user device may determine whether the driver is distracted based on the user profile and the usage data, and may respond in one or more ways, such as by alerting the driver with an audio signal, disabling a feature of the user device, logging instances of user distraction with a diagnostics device, activating a braking system of the vehicle, warning nearby drivers about the driver being distracted, and more.