Glow, the “ambitious enterprise that uniquely applies the power of data science to women’s health” has a new app for iPhone. Ruby, available for free on the App Store, is a sex and health app “for women who want to avoid pregnancy”.

With Ruby you can get information about birth control, contraception, ovulation and fertility, as well as keep track of your menstruation and cycle symptoms.

To start using Ruby you need to answer the following questions:

  • What is your average cycle length?
  • When did your last period start?
  • What is your primary form of birth control?

You will see on the main screen a ring with your period days marked in red and your “fertile windows” colored in green. The status of your current cycle is located in the middle of the circle.


You can keep a record of your sexual activity, your moods and physical manifestations to see a trend. There is also the possibility to save all this information by signing up for a free account inside the app.

The “Me” section has a broad range of birth control topics – from the pill to sterilisation – and you can even get access to Glow’s community right inside the Ruby to get your questions answered by members.

Ruby has a very user-friendly interface that fits with iOS 8’s plane design. At the moment, there is no Android app, but Glow says that will change in the future. What do you think of Ruby?

Download Ruby for free for iPhone, iPad and iPod Touch with iOS 7 or above