Definitely not worth your money This has to be my biggest Amazon purchase regret and I wish I could return it after 4 months of trying. It is so hard to use, hard to remember how to use, the app sucks, and this technology is not nearly as smart as it leads you to believe. You can’t track your period start days unless you remembered to take your temperature that morning and you can’t go back and update information from over 3 previous days so if you forgot to take it your temperature you’re screwed. You have to manually sync the Daysy to the app and the app to the Daysy- this is fairly straightforward but not something you’d expect from a €300 device. The app feels outdated and pales in comparison to competing apps like Flo. I sincerely do not know how this has 5 star reviews on every platform. If it were €20, it’s totally worth the money. Maybeeee €100. But €300 is ridiculous for how cheap it feels, how outdated it is, and how complicated it is. I seriously doubt this was even made by women for women.

Works extremely well Daysy helps me monitor my fertility for preventing pregnancy, and it has worked perfectly so far. The app is great and I have had no issues with the device or the app. I love being able to download the charts and analyze my biology. Once I got a higher number of red and yellow days, so I reached out to customer support. Within one business day someone responded and provided an in depth analysis and advice.

I have had an absolutely horrible… I have had an absolutely horrible experience with daisy. Daysy didn't work, is not worth the money and the customer service is horrible! I tried to make contact with daysy to troubleshoot and they were not willing to help me, would not give me a refund for my defective product and insisted on emailing me rather than calling me. Needless to say, I'm extremely frustrated to have a defective product that I paid hundreds of dollars for.

Not easy to use Not easy to use. Not as insightful as I would have liked into my overall cycle health. Hard to know if it was worth it. Setting it up and troubleshooting the issues was not easy and can't say that I had a great customer service experience--not great return policies. I still think my Daysey is broken but now I'm stuck with it and no one there seems to care. Overall not happy with this purchase and think that the company could do better to with customer service, instructions on use, trouble shooting and warranty.

Can't revise menstruation data from >3 days prior Your product doesn't allow you to go back to revise menstruation data if it has been 3 days since the entry. This makes it extremely frustrating if you've already logged multiple months of data, and now have to do a factory reset in order for Daysy to accurately track your cycle. I have contacted Daysy about this issue, and have not been given any way to fix this issue without reseting the device and starting its tracking from day 1. I haven't found any cases online of other customers who have been able to resolve this issue either.