A computer-based system for monitoring and improving a user's dietary compliance by providing the user with multiple forms of feedback designed to encourage adherence to a dietary program. In one embodiment the system comprises a personal computer having a commercially available telephony card and a cellular telephone carried by the user. The system automatically calls the user each evening and prompts the user to input whether the user adhered to the dietary program for each of that day's meals. The system accepts and stores the input, calculates whether the user is achieving their dietary goal, and gives the user positive or negative audio feedback based on whether the user is meeting their dietary compliance target.