Personally I can?t see this giving you a 3 month accrete record, it?s much the same as testing your BS on a daily basis, a bit like a car MOT, your BS level is measured at that point in time. When this is done at the clinic the blood has to be taken from a vain and they use a fair amount compared to a pin prick this is because the sugar in your blood sticks to the red blood cells and these live for around 3 months and this is how they get the reading for that period, maybe one of functions of this reader will show you your average reading over a period of time, I enter all my readings into a very simple spread sheet and not only does that give me my average on a day to day month to month basis but also since I started recording my BS level when I was diagnosed, I also get a very pretty graph showing me all the ups and downs.