Display EMG reading (muscle activation level) from one or many M40 Muscle Sense wearable EMG muscle sensors (by ANR Corp). Uses Bluetooth LE (v4.2) for device connections. Monitors the muscle activation level both numerically and with configurable bar graph. Session data can be collected in Charts and in Log Files which can then be viewed and exported for analysis. Biofeedback feature provides audio and haptic feedback. All features continue to operate even if the app or the phone is in standby.