iPhone Screenshots


DaysyView is an App for tracking your menstrual cycle.

Implement your own temperature measurements and menstruation data, or simply connect Daysy and automatically download your measurement data from your fertility tracker.

With Daysy you are in control of your own fertility. Know when you are fertile and when you are not.

Daysy is the next generation fertility tracker, which tracks your daily fertility status by recording your basal body temperature and using a statistical model to track your cycle. With DaysyView, you can download this data to take with you and view prognosis about your cycle in the coming weeks. Valley Electronics has a proven track record of 30 years in building high quality fertility tracker.

- View your daily or weekly status of fertility
- See your color-coded monthly calendar
- View the past and the predicted future fertility
- See your temperature curve over time
- Make notes
- Synchronize your temperature value via Daysy fertility tracker or by entering it manually from a standard thermometer
- Share with your loved one
- Contact our expert team for advice and support

What’s New

Version 1.5.3

- Updated Privacy Policy
- Updated "Ask an Expert" mail addresses

Ratings and Reviews

R3ni3 ,

Love love love!

The app works so great as a complement to the Daysy device. It’s wonderful to learn and be able to visually track my cycle. Five out of five stars.

nikaliste ,

New to Daysy: Excited but Disappointed

I am really excited about getting a daysy but very disappointed in the app! I was hoping to be able to enter more information (like vaginal discharge) to help with tracking. Especially since that provides a HUGE indication of cycle status.

Tsaipr27 ,


This is honestly one of the crappiest products I’ve ever tried. I’ve been using Daysy for the past 7 months. During this time, my device has 1) broke from falling a total of 12 inches from my bed frame onto the ground 2) had so many syncing issues and battery warning issues. The customer service team would not replace my daysy even though the tip was damaged 1 month into my purchase, and I bought ANOTHER one. In addition, I had so many user errors and followed their instructions to fix these errors every time. Most recently, they told me their instructions would not clear my data. It did clear my data, surprise surprise. This device is poorly manufactured and too full of errors. NOT user friendly whatsoever. I would strongly recommend against this device. It is so expensive and built horribly.


Valley Electronics AG
9 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, French, German, Italian, Polish
Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information
Infrequent/Mild Mature/Suggestive Themes
Infrequent/Mild Sexual Content and Nudity
© 2018 Valley Electronics


  • Family Sharing

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