INS and type 1 diabetes mellitus: In the past, it has been suggested that bolus calculator use could improve outcomes when used consistently by people with T1D,14,15 but a recent well-designed 10-month randomized crossover study using an automated bolus calculator device failed to show improvements in HbA1c or quality of life.16 Although this study was conducted using a simpler bolus calculator based on static BG readings for multiple daily injection users, the requirement for the user to enter insulin doses and BG readings manually for correct usage likely affected outcomes.