Hi poppy it's my 1st month using the monitor. You set it to start on day 1 of you're cycle. Then you have a 6 hour window every day to turn the monitor on and it tells you if you need to test or not (sticks sold separately btw.) As its my first month it has asked me to test everyday since day 5 which means 20 sticks so far (you get 20 per box) and I got Low readings until day 15 followed by one high day, two peak days, one high day then back to low everyday. I was pleased to get two peak days showing the first month as the monitor is getting to know you're body the first cycle in particular.
I've been TCCing now for 16 months so getting this monitor has given me a new since of hope and I also feel like I've got some control back.
Good luck with whatever you decide hun.
I'm on day 25 now AF due day 29 so hopefully the BFP is what I get instead.
X j