Abstract: A computer based personal trainer system and method for maintaining a diet and fitness regimen to improve overall health of the person and support the person to adhere to the diet and fitness regimen for predefined duration of times. An interested person subscribes to the service by sending a short request text message with a mobile phone device. Primary profile, diet, and fitness profile, and personal preferences of the subscriber are updated and maintained in a database of the system. The database also includes a plurality of compiled diet information, fitness, and motivational messages. The system has a main server that has a plurality of applications that process the subscriber requests and sends appropriate data to the cell phone of the subscriber.