Daysy is an intelligent fertility tracker that lets you get to know your very own menstrual cycle. Thanks to Daysy, you know exactly when you are in your fertile window and when you are not.
Is Usa Daysy legit?
Usa Daysy (usa.daysy.me) has a 4.0 out of 5 rating on OK.one, based on 100 user reviews collected here. It is listed under Health & Medical and its reputation is good. 73% of reviews are 4 stars or higher and 18% are 1 star; The business has replied to 87% of negative reviews. Last updated 2026-09-05.
Love it, but it could be better. I noticed I’m missing readings because I’m half asleep and I think it’s taking my temp but come to find out that I accidentally clicked the button twice and it was trying to sync instead of take temp.. Should probably change the blue tooth connection color and temp reading color. When you’re half asleep they look the exact same. Also, when using the app you can’t make a note or update sexual activity if it was a week ago. What’s up with that?
Reply from Usa Daysy2020-01-30
Hi Jennifer, Thanks for your feedback. The entire blue light will swirl around the ring when temping, and only two lights will blink on the side when entering bluetooth. Please don't hesitate to contact us at [email protected], and we'll be happy to review SI data entry!
It's been so empowering to learn my unique cycle without hormonal junk in my system. Daysy is easy to use and understand. A minute in the morning is the best decision I've made in my journey from TTA to TTC. I recommend Daysy to all my friends! I'm never going back on hormonal birth control again!
It never syncs properly with the app. You have to continue doing it over and over till it finally works. When I input information half the time it doesn't save. It takes about 2 minutes for it to take your temperature. For the price, it's just ridiculous that it all works so poorly.
Reply from Usa Daysy2020-01-31
Hello, please reach out to us at [email protected], and we'll be happy to resolve your sync concerns. Typically, it just involves following the correct order of steps to get success.
I’ve been using Daysy for 7 months after not liking the effects of the pill and not liking other options available to me for birth control. I’m still not pregnant so I’d consider it a raging success. That, and I’m not putting added hormones into my body every day.
I can't imagine my life without the Daysy! I'm super grateful for this device and trust its reliability. I value my cycle more since using the Daysy, and I love not being able to worry about condoms since I'm good to go on green days. My partner gets excited for my green days, and the waiting makes the experience even more special, without the worry!
I love my Daysy! It is way better than using oral birth control because it helps you get in tune with your body and learn more about your cycle. I would recommend the Daysy to anyone whether it is for birth control or to help someone have a baby.
Reply from Usa Daysy2020-01-29
We appreciate you taking the time to respond, Ashley!
Lots of orange days despite being very regular and taking temperature daily AND using the device for 6 months.
FYI: orange days mean that the device advise caution. It does not know whether you are fertile or not. I had to purchase urine strips to pin point ovulation days with more precision.
All that said, I love my daisy. I just wish I had more green days. I should say that I am using Daisy for contraception not to conceive.
Reply from Usa Daysy2020-01-29
Hi Valery, If you'd like to email us at [email protected], we'll be happy to do a fertility analysis for you to look into why you may be receiving a higher number of yellow days.
I love the concept of this device, but unfortunately there have been many glitches with syncing to the app. I have been in contact with customer service in the past about this issue and I am disappointed that these issues keep happening, especially for the amount of money I spent specifically to have an app associated with my fertility device.
Reply from Usa Daysy2020-01-29
Hi Laura, Thank you for your feedback. If you'd like to reach back out to us at [email protected], we'll be happy to look back into your concerns to make sure they're resolved.
I've been using Daysy since October and am really loving it so far! I think some improvements can be made to the app but the product works very well. I would definitely recommend.
I was really nervous about using daysy as my birth control method but it really came through and works for me and I’m able to trust my body without putting any chemicals into my body. Thank you daysy for changing my life.
While the device seems to work well, it will not sync with the app.
Reply from Usa Daysy2020-01-29
Hello, if you'd like to email us at [email protected], we'll be happy to resolve your synchronization concerns. It typically can be solved in minutes by just following the correct order of steps.
I’ve been using Daysy for over 4 years now and I couldn’t be happier! After years of being on the pill I wasn’t comfortable with taking hormonal BC anymore and found this to be the best natural option. Daysy and the Daysy view app are both very easy to use, the customer service is great and I would say this is definitely worth the price! I’ve gotten more in tune with my body and my natural cycle, and I no longer have to deal with the stress of how synthetic hormones are affecting my body long term. I’ve since recommended it to friends who have also fallen in love and I will continue to use Daysy as long as I need her!
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.
Reply from Usa Daysy2020-01-29
We appreciate you taking the time to provide us with your feedback, Jennifer!
The product works ! You need better customer service and better instructions manual. I had to YouTube for instructions online.
Reply from Usa Daysy2020-01-29
Hi Nancy, We have a very responsive and friendly customer support team, so please do not ever hesitate to reach out to us at [email protected] with any questions.
I love daysy!!! Best product ever. I know so much now about my body. I know when I am fertile and when I am not... huge game changer. So so so!!! Happy with this!
My device is broken and the staff never responded to support email.
Reply from Usa Daysy2020-01-30
Hi Quinn, I'm not sure where you're located, but our customer support team is quite responsive. If you didn't hear from us, we likely did not receive your email. Please email us at [email protected], and we'll be happy to support you!
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