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Calculating IOB with MDI and Dexcom ONE

A

Allyee

Newbie
I am an MDI basal-bolus user and am about to switch to using a Dexcom ONE. I know my I:C ratios so mental calculation is not so hard but IOB is a whole other topic. I would love to be one of these ultra-disciplined people who eat to planned schedule and never get into insulin stacking situations but I am not, sadly! What apps do people use to calculate IOB, pros/cons and recommendations for me as I want to insulin dose using my Dexcom ONE.
 
I make a note every time I inject, and I use a novopen 5 which remembers your last dose, so I can quickly look up when I last injected to know if I still have active insulin circulating.
 
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