# 2Day Method - Fertility Awareness & Family Planning

> Natural family planning app tracking secretions to identify fertile days. (iPhone/iPad app by Cycle Technologies.)

- Source: https://appshunter.io/ios/app/2day-method-fertility-awareness-and-family-planning/id889707994 (this page in markdown: same URL + `.md`)
- Developer: [Cycle Technologies](https://appshunter.io/developer/401996966)
- Category: Health & Fitness, Medical
- Price: Free
- Rating: 3.25/5 from 8 App Store ratings · 8 written reviews indexed
- Age rating: 12+
- Requires: iOS 5.1.1 · 6 MB
- Languages: English
- Released: 2014-07-07
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/2day-method-fertility-awareness-and-family-planning/id889707994/reviews.md

## What is 2Day Method?

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. 

HOW IT WORKS
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. 

EFFECTIVENESS
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.

WHO CAN USE THE 2 DAY METHOD?
ANYONE. Even women with irregular cycles can use this natural family planning tool. It is based on your own unique cycle. * 

KEY FEATURES:
-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

LEARN MORE
www.twodaymethod.com
info@twodaymethod.com

* 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.

## Key features

- One-click data entry
- Instant fertility status
- Fertility calendar
- Period tracker
- Ovulation calculator

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/2day-method-fertility-awareness-and-family-planning/id889707994/reviews.md

### 3/5 — Please update app so I can use it

*2023-07-31*

Please update app so it works for latest iPhones updates refusing to install

### 3/5 — Learn the 2Day Method first — pls fix app!

*2020-05-28, version 1.0.1*

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.

### 5/5 — Great method but not so pretty

*2019-11-21, version 1.0.1*

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.

### 1/5 — Won’t even open.

*2019-10-02, version 1.0.1*

First major issue: the app won’t open. Tap it, it starts to open and immediately crashes and closes.
Second major issue is what seems to be a misleading presentation of the effectiveness of fertility awareness based methods. The app description says the method is so easy to use it’s more effective than sympto-thermal methods and ovulation (cervical mucus only) methods. However, tapping through to the website the efficacy stats cited for the Two Day Method of 96% perfect use and 86% typical use) do not compare favorably to the best quality research on fertility awareness based methods we have... the Sensiplan sympto-thermal method (99.8% perfect use and 98% typical use) Marquette method (99.4% perfect use and 93-94% typical use), Billings Ovulation Method’s India Medical Taskforce study (98% perfect use and 89% typical use), or the Creighton Model (99.4-99.6% perfect use efficacy, typical use in these studies was calculated too differently to make a comparison.) 
That’s a problem. This does sound like a very easy method to follow, and the efficacy may well be good enough for some people’s needs. But perfect use of approx 96% means that four women out of a hundred using the method over one year will find themselves unexpectedly pregnant despite having followed the method correctly. Another ten on top of that will find themselves pregnant *because* they used the method incorrectly, despite its simplicity.

### 1/5 — This is a joke.

*2017-07-24, version 1.0.1*

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.

### 1/5 — Disappointed

*2014-12-08, version 1.0.1*

Won't even open, keeps crashing

### 5/5 — everyone should know this info

*2014-10-14, version 1.0.1*

i'm shocked that it took this long for people to figure this out. not sure if i'll actually use it as contraception or will just keep it as reference. either way it seems like every single girl in the world should know this information and sadly most don't.

### 5/5 — SanDiegoGirl85

*2014-07-10, version 1.0*

Super easy app! Good to find something I can use without any effort.

## Frequently asked questions about 2Day Method

### How does 2Day Method work?

2Day Method works by tracking if you had secretions yesterday or today. Based on this simple input, the app indicates your fertile days for natural family planning or pregnancy prevention.

### Is 2Day Method effective for preventing pregnancy?

The Two Day family planning method has been proven over 96% effective in preventing pregnancy. Its ease of use contributes to its effectiveness compared to other symptom-based methods.

### Can women with irregular cycles use 2Day Method?

Yes, anyone can use the 2 Day Method, including women with irregular cycles. It is based on your unique cycle, making it adaptable.

### What information does 2Day Method track?

2Day Method primarily tracks whether you had secretions yesterday or today. It also functions as a period tracker and ovulation calculator.

### Does 2Day Method require tracking temperature or analyzing secretions?

No, 2Day Method does not require tracking basal body temperature or analyzing secretions. It simplifies the process to just noting the presence of secretions.

### What are the limitations of 2Day Method?

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

### What devices does 2Day Method support?

2Day Method is available on iPhone, iPad, and iPod, indicated by its supported devices list.

### When was 2Day Method last updated?

2Day Method was last updated on July 22, 2014, with version 1.0.1.

## Version history (last 2 releases)

### 1.0.1 — 2014-07-22

Updated appearance

### 1.0 — 2014-06-23

No release notes.

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## More apps by Cycle Technologies

- [iCycleBeads Period & Ovulation](https://appshunter.io/ios/app/icyclebeads-period-and-ovulation/id401996963)
- [iCycleBeads Lite](https://appshunter.io/ios/app/icyclebeads-lite/id865192660)

All apps by Cycle Technologies: https://appshunter.io/developer/401996966

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*