application service provider, featuring application programming interface software for allowing data retrieval, upload, access, management, tracking, and analyzing of user data; providing a website featuring technology allowing organizations to administer and manage incentive programs to promote health and wellness; software as a service (SaaS) featuring software: (1) for use in designing, creating, analyzing, and sharing data, metrics, and reports in the areas of fitness, health and wellness, and nutrition, (2) for use in creating a digital twin of a user’s physiology from workout, activity, and nutrition data, (3) for use in simulation of a user’s workouts with their digital twin, (4) for updating the user’s digital twin based on their future activities, workouts, and other uploaded data, (5) for use in establishing and managing fitness, health and wellness, and nutrition goals, (6) enabling users to catalog health habits in areas of fitness, health and wellness, and nutrition, (7) allowing users to visualize the effects of habits on fitness, health and wellness, and nutrition goals, (8) allowing users to interact with other users to form a support network in the areas of fitness, health and wellness, and nutrition, (9) creating non-social groups, that allow users to share their data with corporate users; online non-downloadable computer software for (a) creating and tracking progress towards fitness, health and wellness goals, including weight management, nutrition, hydration, rest, and recovery, (b) predicting the value of future activities on fitness, health and wellness goals, (c) the risks of performing those activities, (d) displaying, aggregating, organizing, and analyzing fitness and health and wellness data and information, (f) displaying progress towards fitness and health and wellness goals, (g) providing personal training services, workouts, fitness assessments, and diet, nutrition, and hydration strategies