iPhone Screenshots


Discover the all new companion app to the Daysy fertility tracker. Designed with the feedback from our users and decades of experience in the fertility tracking market, DaysyDay brings you access to more features and a beautiful new look.

Together, Daysy and DaysyDay provide you with the knowledge and tools needed to identify your fertile window and make informed and powerful choices about your menstrual cycle, fertility, and health.


Past, Present and Future
The easy to read calendar and an uncluttered temperature curve make it easy to view your fertility status, ovulation, and menstruation for the past, for today, and what is predicted in the coming month.

Identify Irregularities
The temperature curve and easy to read average and individual cycle statistics can help you easily identify cycle irregularities and provide insights on how current events effect your overall cycle.

Take Notes
The newly designed data cards let you easily track additional cycle features. Track cervical mucus, intercourse, and your own notes about your fertility and cycle.

Share Your Data
Invite your partner to download the DaysyDay Partner app and then choose which data can be shared and viewed.

Contact Our Expert Team
Use the feature in the app to easily reach out to our expert team if you need advice and support. Our team is here to help you every step of your fertility tracking journey.

Ratings and Reviews

4.1 out of 5
14 Ratings

14 Ratings

rissross18 ,

So much better!!

I’ve had my daysy since 2017 and have used it off and on. The app interface on the old version always frustrated me. It felt outdated. This new app is so much cleaner, easier to use, and has been working great for me! So much so that I decided to purchase the newer Daysy 2.0. Thank you Valley Electronics! Keep the app updated and fresh and you’ll have a Daysy user for life!

Developer Response ,

Thank you Rissross18! We're so glad you like the new app and we can't wait for you to see what we have planned :)

leachyyyyyyassssss ,

NFP/FAM made easy!!

Absolutely love this app! It syncs fast and has lots of new features. Makes it so much easier for me to track everything in just one app! I also love the fact that there’s a partner app so that my husband can follow along whenever he wants! Highly recommend!

Developer Response ,

Thank you for the review! We're so glad you love the app as much as we do and we were able to bring the Partner App back for you!

lac2021 ,

Not very impressed

This app works faster than the previous one but the tracking options are very similar.

I was hopping to track details such as spotting (bleeding outside of the regular period time), ovulation test results, etc. There are so many options in the market that track everything in one place and pair with BTM devices. I feel frustrated for having bought A device as expensive as daysy and not getting everything I need.

App Privacy

The developer, Valley Electronics, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Valley Electronics AG
41.2 MB

Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Italian, Spanish

Age Rating
Infrequent/Mild Medical/Treatment Information
Infrequent/Mild Sexual Content and Nudity
Frequent/Intense Mature/Suggestive Themes


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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