LifeSign QuitKey Smoking Cessation Computer Editorial Review: QuitKey alters your smoking routine and eases you off cigarettes gradually. QuitKey reminds you when to smoke and when not to smoke. Step by step. Hour by hour. One day at a time. The QuitKey approach to quit smoking culminates 20 years of research. It was developed and proven effective with grants from the National Institutes of Health and builds on the enormous success of LifeSign, a first generation smoking cessation computer that uses the same gradual reduction technology. QuitKey works in two stages. Stage 1 (7 days): You smoke at your normal rate and use the QuitKey smoke button to record every cigarette you smoke. QuitKey uses this information to form your personal quit plan. Stage 2 (14 to 34 days): QuitKey helps you follow your quit plan by prompting you when to smoke. Each day you smoke less and gradually reduce you nicotine dependence while preparing yourself to quit for good.