Don't know if this will help anyone but I started using the kit the day after my period ended (9/2). It read LOW until 9/6, when it went to HIGH. This was the first time I've seen HIGH but it's also my 2nd month using the kit but the first month using it at the correct starting point. Anyhoo, from 9/6-9/11 I got HIGH readings but I knew I was about to O, not bc Glow (although I love the layout) was about to tell me, I think some info I entered earlier/right after my period made the program move my O date up 4 days...I knew it was off but I didn't fret. I went based off of The M Cycles app (which was spot on for me last month. But the most important factor and how I knew I was about to O, was...me! The morning of 9/11 I was at HIGH. But later in the evening I got a slight headache out of no where. And I read that, that is a sign. So, I went home and looked at my CB box and saw this note inside (among the tips was one that said once you test HIGH, you can test twice a day to catch the peak). So, I tested again, keep in mind it had been several hours since I urinated and sure enough, it was at PEAK. Here's the kicker, that reader was the same one I used for 2 months. So, that means I had to get another box (needed more sticks) with it's own reader, so to confirm that I was peaking, I used the new reader and boom..I was definitely peaking! I'm so glad we BD'd the morning of 9/11 and again 9/12 (we'll be doing it tomorrow -- teehee). Those precious hours make a huge difference!! This is my 2nd month trying to conceive and I'm so in awe of our bodies and am learning that if you just relax, your body will tell you everything. Not sure what our outcome will be but I hope this helps someone out there. Light and lots of lovin' to you all!​