The 2Day family planning app makes it easy for a woman to identify her fertile days and plan or prevent pregnancy naturally. It’s based on a patent pending methodology called the TwoDay Method® which was specially designed by researchers at the Institute for Reproductive Health. It’s brought to you by Cycle Technologies, the maker of Brilliantly Simple™ fertility tools that have been used by over 3 million women worldwide.

To use the 2Day Method a woman simply needs to know if she had secretions either yesterday or today. The 2Day app tracks this information and helps her see patterns in her cycle. There is no need to track temperature or to analyze secretions any further! Just a simple click to indicate whether she had secretions today or not and the app will let her know if she is fertile today.

The Two Day family planning method has been proven +96% effective in preventing pregnancy. Because it’s so easy to use, it’s actually more effective than other symptoms-based family planning methods such as the sympto-thermal and ovulation methods used by the majority of fertility apps.

ANYONE. Even women with irregular cycles can use this natural family planning tool. It is based on your own unique cycle. *

-One-click data entry makes it easy to enter information
-Instantly know if you are on a day when you can get pregnant or not
-Fertility calendar helps you readily see trends in your cycle
-Period tracker, ovulation calculator and ovulation calendar


* Women who have recently been pregnant or who have an infection may find that the 2 Day app indicates that they are potentially fertile when they are not.

What’s New

Version 1.0.1

Updated appearance

Ratings and Reviews

3.3 out of 5
8 Ratings

8 Ratings

DarkSunman ,

Learn the 2Day Method first — pls fix app!

Another reviewer seems to not understand what this app was made for. In the 2Day method, you have no need to track what type of mucus (or secretions) you are making — only whether or not you have them at all. Of course, this means that women who produce lots of secretions are unable to use the method without lots of abstinence. If you want to know if the 2Day method works for you, learn more about it from Georgetown University’s website on the method. If the method is a good fit for you, then the app works really great! Last time I used it, I loved how simple it was, and could keep notes in the app too.

Unfortunately when I downloaded it to my new phone, it refuses to open. No idea why. But it’s a shame because I was very willing to try out the method again. For this I had to bump it down from five stars to three stars. Otherwise, the app I remember was a joy to use.

Lupida1992 ,

Great method but not so pretty

This is a well researched method. You dont have to know everything about fam to use it. Love the method! The app could be a lot prettier though.

Brittabean18 ,

This is a joke.

I entered today that I had "secretions" and he app told me pregnancy likely... yeah uh nope. First of all, we don't have secretions, we have cervical fluid or cervical mucous. Secondly, i marked that I had "secretions" because I have lots of creamy cervical fluid happening. That is not a peak type fluid! So how can this app say pregnancy likely?? I know exactly when I'm fertile based on FAM symptoms-thermal method, and I am NOWHERE near my fertile window.

App Privacy

The developer, Cycle Technologies, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

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


  • Family Sharing

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

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