I'm not familiar with the Libre 2. With the Libre 3 there is no checking, it records every minute of every hour of every day with no action on your part and the home site has more stored info on your status than you can imagine. I have found that after a couple days it's good to check the device against a finger prick. I have had a few faulty units whose readings made no sense. But by and large the Libre 3 is spot on. Good day to you, your doing just fine.