Danish entrepreneur Ida Tin, co-founder and chief executive of female health app Clue, created a way for women to track their period, predict their fertility, and related symptoms such as mood swings or premenstrual syndrome.

Ida Tin told BBC News, that today's revolution for women is knowing exactly when to expect their period. She said that the inspiration of the business came from her personal experience.

According to the New York Times, Ida Tin's motivation in developing the app was to provide women with more information and greater understanding about their bodies. The app is said to be a navigating tool for women's life.

Founded in 2012, Clue app now has more than 2 million users in over 180 countries. The app is said to be the world's fastest growing menstrual cycle tracking app.

The founder said that the app doesn't have a typical app user. Its users are as diverse as the women in the world that want to know  themselves and their bodies better.

Clue app predicts dates of the user's next period, PMS and the days that she's  more or less likely to get pregnant. It also suggests if the user's mood connected to her cycle.

According to the Daily Mail, Clue's founder also claimed that the app can help to prevent beauty issues which can flare over the 28-day cycle like greasy hair and spot outbreaks.

The app tracks the menstrual cycle of women are for health and beauty reasons. Ida Tin stated that Clue is about noticing the users' own changes and patterns and tailoring their skincare regime around it

The app also can help women to remember to take contraception. It also suggests which products to use to combat beauty problems. The more information that a user puts into the app the more the app becomes helpful.

Clue works closely with doctors and reproductive health scientists to ensure its accuracy.

Clue's office is based in Germany with 22 of full-time workers that help develop new features for the app and increase the number of users.

It recently  raised $7 million of funding from New York-based venture capital firm Union Square Ventures and London's Mosaic Ventures. The total funding for Clue app has reached $10 million.

However, the app hasn't made any money yet for the company. The app is free to download on iPhones and Android smartphones. The founder hopes that Clue will start to generate revenue within the next few years.