How many diffrence of glocomeater and lab reading.and is accucheck active is good or any other

Every glucometer has a range of acceptable variation legally. Some read a little high some a little low and others are a bit hit and miss. Look at the trends and general figures and don’t focus on the precise number. There will often be a small difference between glucometer and blood glucose levels but it shouldn’t be significant.

The estimated hba1c the glucometer gives can be very variable as it depends how many readings you took,and how good a sample they were of all your levels, high and low.

accuchek is a well known brand.