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.
Usa Daysy (usa.daysy.me) has 378 customer reviews on Five Star Index, with an average rating of 4.0 out of 5.
Also known as
usa.daysy.me
Website
usa.daysy.me
Category
Pharmacy & Medicine
Listed on Five Star Index
2026
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The company replied to 96% of reviews.
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Most recent review: April 2025.
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It is not user friendly and it’s hard to go back and change input if you registered ovulating and you’re not.
Response from Usa DaysySep 3, 2019
Hi Alexis, My apologies for the delay. There is not a way to input ovulation into your device. There is a way to input menstruation. Please email us at [email protected] if you're having any trouble.
MA
Max
We can't use it correctly because the…
We can't use it correctly because the app doesn't work with it. I regret to buy it.
SA
Sara
Save your money. This doesn't work
I got my daysy in the end of March, and it still is way off with its predictions. It will flash violet predicting my period 10 days too early every month, and then the last 4 days of my period it will stop predicting my period. I try to retroactively enter period days but it wont register them on the app.
Also its complicated learning what all the lights and flashing patterns mean, not so simple. I have to frequently refer back to the videos online to remember how to use it.
My free period tracker app on my phone is 100% more accurate. I feel really disappointed that I wasted all this money on a glorified thermometer.
Save yourself 300 bucks and buy a $10 thermometer and get a free period tracking app and you'll be much better off.
It's the last time I'm listening to people on youtube (probably paid or given the daysy free to post good reviews) for recommendations.
Response from Usa DaysyJul 10, 2019
Hi Sara, It does take 3-4 cycles for Daysy to learn your unique cycle rhythm. Our support team would be happy to walk you through how to use Daysy, what the lights mean, how to use the app, etc. Please give us a call at 877-925-5239, and we'll be happy to assist you.
FW
Franchesca W.
DONT BUY DAYSY
PLEASE READ BEFORE YOU BUY SAVE YOURSELF THE TIME AND MONEY! DONT BUY DAYSY!! My daysy stopped working after 3 months warranty doesn’t cover the cost of shipping Daysy back to get repaired. There is only a 30 day return policy. DaysyView app also sucks. I wish I had good things to say but this is a bad product with bad customer support and service.
Response from Usa DaysyJun 17, 2019
Hi Franchesca, We're sorry you feel this way, but we hope that now that your Daysy has been serviced and updated that you will have a better experience moving forward. Please do not hesitate to reach out to us at [email protected] if we can be of further assistance.
SA
Sabine
Pregnant
I really wanted to love Daysy, and totally did while using it at first.
I respected red and yellow days and did exactly as explained in the instructions.
2 months later = pregnant.
Not really what I was looking for.
Response from Usa DaysyMar 19, 2019
Hi Sabine, Please email a complete data file to your customer support team so that it can be passed along to our fertility experts for analysis. They will be happy to assist you in looking into this further.
AF
afra
Daysy ging nach 22 Monaten Benutzung kaputt, kein Ersatz bekommen :-((
Hier die ausführliche Geschichte meiner Daysy...
2015 habe ich mir eine Daysy zugelegt, in der ersten Zeit war ich sehr begeistert von ihr und habe sie auch einigen Freundinnen empfohlen.
2017 kam dann unser Wunschbaby auf die Welt. d.h in der Zeit der Schwangerschaft habe ich die Batterie aus Daisy rausgenommen und sie in den Schrank gelegt, nach der Geburt und der anschließenden Stillzeit in der ich Daysy nicht verwendet habe (circa 20 Monate Pause für Daisy) lies ich sie vom Daysy-Support überprüfen, legte eine neue Batterie ein wollte wider neu starten.
Ab da hat sie leider nicht mehr richtig funktioniert. Sie lies mich morgens nicht mehr messen, brummte ärgerlich und tat so als wäre sie noch am Übertragungskabel angeschlossen. Am Anfang dachte ich das ich sie vielleicht nicht richtig verwendete und lies mir vom support-Team noch einmal genau erklären wie ich sie zu bedienen hatte, aber es stimmte alles! Ich bediente Daysy richtig, aber sie hatte immer massivere Probleme und dachte immer öfter das sie noch am Übertragungskabel hing und lies mich immer seltener messen. Inzwischen funktioniert sie leider so gut wie nie mehr, und das ist extrem ärgerlich!!
Ich besitze Daisy seit August 2015 das sind 42 Monate und habe sie 20 Monate davon nicht benutzt, jetzt geht nix mehr :-(((
Sie ist mir nie runtergefallen, ich habe sie immer in einer festen Brillenbox aufgehoben, und auch für die 20 Monate Pause die Batterie rausgenommen, wie vom Support empfohlen.
Was mich auch ärgert ist das das Daysy Support-Team ja alles mitbekommen hat, wie Daysy immer schlechter funktionierte etc und jetzt bieten sie mir gerade mal 20% Rabatt auf eine neue Daysy an! Ich frage mich ob diese Daysy dann wohl auch nur gerade ihre Garantie-Zeit überlebt?!
Theoretisch finde ich Daysy gut, aber nicht wenn sie nach 22 Monaten Benutzung kaputt geht, dafür ist sie zu teuer!!!
MV
Mola V.
Since the update the app doesn't work…
Since the update the app doesn't work anymore. It's not possible to indicate the period afterwards and it crushes ALL THE TIME! Also it's not possible to see the temperature curve anymore. I expect more from such an expensice device that comes with an app!
Response from Usa DaysyJan 29, 2019
Hi Mola Viola, We are open for improvements and thank you for your feedback. We remain committed to keeping you informed about the app update progress. If you'd like to join our private group on Facebook (Daysy Fertility Tracker - Sisterhood and Support), we are keeping customers up to date on what they can expect from continuous app update roll outs. The concerns you mentioned will be resolved in the next app update due out this week.
RO
Rosh
Don't buy, huge ripoff and app doesn't work
I purchased my Daysy in August of 2018 and it was working fine and had no issues. Then it started making me take my temperature twice because it can never get it on the first reading. Even though I always keep my mouth closed and don't move. I have never dropped my daysy and have always kept it by my bedside table so it is in perfect condition.
I read an article about how daysy can't actually predict fertility and how the science doesn't back it up and this scared me but I thought well I paid $500 so have to keep using it. Then it predicted I was pregnant the day before I got my period because I was a couple days late, so now I don't think it actually reads temperature and I don't trust Daysy. The app also stopped working in that every time I try to sync with my daysy, it says the connection is interrupted. I contacted support and, besides the delayed response times where I have to email them again, they keep sending me things like "have you tried shutting it off and turning it back on again" or "are you receiving texts or making calls while trying to sync your daysy". It's patronising, really. When I emailed back to say I've done everything they have recommended they say they are aware this is an issue that isn't only happening with me but the app as a whole and the tech team is trying to resolve it. In the meantime I cant change anything on my daysyview app and or see the future predicted dates. I have no idea how a company could make an app update (that is automatic on your phone) without making sure it works first. Check the reviews on the app store, it doesn't work for anyone. And they refuse to reimburse when they admit their product doesn't work (they put a notice on website that app isn't working) Now when friends ask if they should purchase it, I say definitely not. Huge ripoff. You can get the exact same information with period apps like Clue.
Update: in regards to the response from daysy below, the last email they sent 3 days ago just repeats itself telling me to turn off and on again, turn mic up, delete photos and apps etc... App doesn't work!
Response from Usa DaysyJan 29, 2019
Hi Rosh, I'm very sorry to hear of your experience. If you would like to send in your Daysy for analysis, we'll be happy to take a look and do a thorough inspection. We have responded to your email, but it has been several days since we have heard from you. We hope to hear from you soon to get this resolved for you as quickly as possible.