I'm going to be giving g7 a try very soon, I'm already on g6 and previously I was on libre 1 and then 2. With all of those I have put them in for about 24hr before I start them as I find that stops me getting erratic readings for the first 24hrs. I have read that the g7 activates as soon as you put it on and starts it 1/2 hr warm up. Can anyone let me know if I have no choice but to start my 10 days then or when I activate the app??