A system controls assistive technologies with an assistive tool for users with movement and/or communication disorders. The system includes an electronic communication interface, a biometric sensor, a calibration module and a processing unit. The interface presents users with stimuli associated with commands and/or information that the user might select. The sensor detects the user's biometric activity and generates a biometric electrical signal. During initial calibration, the calibration module records signal characteristics associated with a biometric electrical signal detected with voluntary biometric activity. The processing unit recognizes, based on the biometric electrical signal and the signal characteristics, the user's voluntary biometric activity and commands and/or information the user wants to select. The processing unit provides control signals to the interface and the assistive tool, based on the user's selection preferences. The interface presents stimuli based on the presentation control signal, if present, or presents a scan of stimuli.