Computer hardware and software for collection, aggregation, and analysis of human brain data as well as applications for neurodiagnostics, wearable brain health tracking and tracking of brain health, cognition, emotion and behavior with or without electronic sensors; electronic sensors, not for medical purposes, for monitoring, recording, and tracking physiology, including brain activity; computer software for controlling electronic devices for use in neuromodulation and in monitoring, recording, and tracking brain activity; A kit, for personal use, consisting of a head worn device for measuring, tracking, and monitoring electroencephalogram (EEG), electromyogram (EMG), electro-oculogram (EOG), and/or electrocardiogram (ECG) signals, and/or accelerometer and/or gyroscope data, and associated software; data processing services, namely, compiling, generating, processing and managing data and signals produced by a head worn device that measures, tracks or monitors at least one of EEG, EMG, EOG, ECG signals, accelerometer or gyroscope data