The application is based on the scientific research. It helps to determine the fertile days of the month, so you can either achieve or avoid pregnancy. The application uses the date of the last period and shows the date of the next period, the best days to conceive a baby, the ovulation day and when you can avoid pregnancy.

* Scientific Research *

The popular baby gender prediction method is used by default. But it’s based only on the widely-spread theory by Landrum Shettles. The application also supports the scientific baby gender prediction method. It’s based on the scientific research by Rodrigo Guerrero and the statistics of thousands of women.

You can change the gender prediction method on the “Settings” screen. But remember that either gender prediction method shows only slightly higher chances of conceiving a girl or a boy and it never guarantees the result.

* Full Version *

This is the full version of the application. You will be able to see the following data:

- The probability of getting pregnant on the current or on any selected day.
- The probability of conceiving a girl or a boy using the selected gender prediction method.
- Chances of getting pregnant during the current period.
- Chances of conceiving a girl or a boy during the current period.

* How to Use *

To generate the menstrual calendar you have to provide the following data:

- The first day of the last cycle (select the day and use the button “Add”).
- Average length of the menstrual cycle (adjust it on the “Settings” screen).
- Length of the luteal phase (most women can use the default value).

The application works best for women with regular menstrual cycle. But average cycle length is also a good way to predict when the ovulation should happen.

What’s New

Version 14.0

Support for new devices.

Ratings and Reviews

4.7 out of 5
2K Ratings

2K Ratings

Irmanox ,


Honestly if you are using this app make sure you really want a baby! This app is very accurate, we wanted a baby, we tried in the days that the app told me that I was ovulating, and after 2 weeks I did the pregnancy test and it was POSITIVE!!!! I just wanted a baby, it doesn’t matter if it’s a boy or girl, I tried all the days that The app told me haha! But I highly recommended this app!

MaqqiePortillo ,


I was skeptical at first but the app works 🤷🏻‍♀️ Even though God has the last word 🙏🏼. I believe it’s has a good chance to predict the gender. 👦🏻👧🏻

Nexsu ,

Great but..

This app is great with tracking my periods but I’m having a hard time with my ovulation. It’s not the typical 14th day for me, I ovulate on the 17th day but I can’t change it on the app. Other than that it works great. If you could please fix this feature it would be perfect!

App Privacy

The developer, Anastasia Kovba, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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