marginally significantP =.06
In the quit and maintenance phase, we found a marginally significant effect of using the medication tracking feature on the 6-week cessation status (Wald χ 2 1 =3.57; P =.06; OR 2.66, 95% CI 0.96-7.36), and a significant effect on the 12-week cessation status (Wald χ 2 1 =8.83; P =.003; OR 4.76, 95% CI 1.70-13.31).