Very little blood is needed. And if the correct amount is not inserted, the strip does not cancel. You continue normally and add as much blood as needed.

Economical and reliable.
Compared to others that don't require you to puncture yourself again, these work with the smallest amount of blood.
They don't need to be necessary, but

These movies are okay for roughly knowing how sweet you are, but the laboratory measurement is definitely more accurate.

It requires minimal blood, easy to use, and has very reliable measurements. For me, who has tried several machines, it wins

I consider this particular product for measuring sugar (preventively or not) to be reliable and easy to use. Of course, the contribution of the skroutz.gr website, which is staffed with competent personnel, is important. I recommend consulting skroutz.gr before making any purchase, as it is fast, up-to-date, and reliable.