This app connects to your FlexVolt Biosensor. See www.flexvoltbiosensor.com for more information.FlexVolt Viewer is a biofeedback app for use with FlexVolt EMG sensors. Great visuals of muscle signals, and now auditory feedback as well! Export raw and filtered data to a folder of your choice. Use for physical therapy, relaxation training, or biohacking! Sensors can be found at www.flexvoltbiosensor.com