I have PCOS with cycles ranging from 33-52 days. My husband and I had been trying for 1.5 years, even trying Letrozole and trigger shots for ovulation, which proved to be unsuccessful three times. Insurance only covers four rounds, so we decided to buy the Inito monitor and try on our own. It worked the very first cycle! I didn’t even use Preseed, legs in the air, or any of the other “tricks” we had tried in the past. So happy :) I also used Inito the same day I had blood work done and the results were almost identical so it is definitely accurate!If you also have PCOS/unpredictable cycles, I’d recommend ordering another pack of tests as soon as you receive the kit and can order through the app.The one downside was that they sent the wrong size phone attachment the first time which made me miss my testing window the first cycle that we had wanted to use it. However, customer service is great and they did send a new one which I used the following cycle.