A network of multitier user's devices (mobile units) that performs household chores and functions as a mobile general purpose autonomous intelligent machines, having some primary functions and a plurality of additional secondary functions. The primary functions include one or more of vacuum cleaning, lawn mowing, typical drone functionalities, the additional autonomous functions include wardrobe management, premises safety, sentry job, rendering personalized music, self-recharging from typical electric outlet, self-learning to predict the users' behaviors and planning and scheduling the functionalities (decision making) accordingly, providing AI (Artificial Intelligence) assistance and support, Day-In-Life recording and support and so forth. The Day-In-Life recording functionalities involve predicting users' behaviors, identifying routine, salient features and important events ahead of time, and electronically recording and storing the routine events, salient features and important events, with the support of a cloud based central support and services server system.