Quitex was an on-line decision-making tool aimed at encouraging smokers to make a quit attempt. It was designed to take a user through a series of decisions that will result in them setting a quit date and choosing a quit method, as well as considering which distraction techniques they could employ in situations where they are most likely to relapse. The project was designed as a pilot to evaluate the effectiveness of Quitex. The project consisted of two parts: promoting use of the on-line application through primary care settings in Cardiff and the Vale of Glamorgan; and analysing the data collected about users’ quit attempts.