Wearable activity trackers for tracking, monitoring, displaying, measuring, storing and reminding users to perform hand and bodily hygiene and disinfection, and of body temperature; Wearable activity trackers for developing, increasing and promoting habits of personal sanitation and hygiene, and healthy lifestyle; Wearable and non-wearable activity trackers for data transmission via wireless and wired communications networks; Data recording apparatus; Wearable activity tracker for tracking, gathering, monitory, detecting, recognizing, storing, transmitting, managing and accessing hand hygiene and prescribed hygienic protocols; Wearable activity trackers for data transmission via wireless and wired communications networks; Multifunctional electronic devices for tracking, monitoring, displaying, measuring, storing and reminding users to perform hand and bodily hygiene and disinfection, and user's body temperature, for purposes of developing, increasing and promoting habits of personal sanitation and hygiene, and healthy lifestyle; and Multifunctional electronic control devices consists of wearable electronic device for use in tracking, monitoring, displaying, measuring, storing and reminding users to perform hand and bodily hygiene and disinfection, and user's body temperature, for purposes of developing, increasing and promoting habits of personal sanitation and hygiene, and healthy lifestyle