Proov has been a consolation to my husband and I for the past 7 years of our 13 year journey with charting my cycles and seeking natural ways to interpret times of fertility and infertility. I’ve also been able to identify and treat hormone imbalances regarding my progesterone levels that I would not have known without Proov. I am always letting other women know about Proov and they are amazed that this tool exists for personal use but the price is likely a challenge for access to more women which is why I rated 4 stars. The quality, support and data Proov provides are worth it!