What is billingsMentor® (ovulationMentor)?

billingsMentor is a web service and cell phone App that guides you in observing, recording and interpreting your fertility symptoms according to the Billings Method.

New Users: download the app ( Google Play; iTunes) or register here (iPads; desktops) Registered Users
Free charting - conditions apply, otherwise 2 weeks trial then $20 one-off fee for iPad and desktop users.

A New Approach to Charting and Learning

billingsMentor avoids the use of stamps and symbols by visualising fertility as a simple bar chart that combines fertility with the rules of the Billings Method. This is an important aspect of the e-learning experience.

The data entry form includes guidance for entering your fertility symptoms.

You have the option of learning the Billings Method independently by using the automated guidance, or with a fertility educator.

billingsMentor is of great help to any woman who wants to learn about her fertility while avoiding the use of contraceptive drugs or devices.

For information on the origins of billingsMentor and previous work on internet intervention for the Billings Method see this literature review.

Mobile Access

Google Play


Fertility Awareness

billingsMentor helps you to follow the Billings Method by:

  • guiding you in making a proper entry of your fertility symptoms;
  • automatically generating your fertility chart;
  • interpreting your symptoms and your fertility status on each day;
  • recognizing your Peak day in a cycle and predicting menstruation;
  • allowing you to override and mark your Peak day in a cycle;
  • identifying your Basic Infertile Pattern (BIP) whether you are having cycles or breastfeeding;
  • allowing you to override and define your Basic Infertile Pattern (BIP);
  • applying the 1,2,3 count of the Early Day Rule 3;
  • reminding you of the wait day after intercourse in the pre-ovulatory phase.

Reference: The Billings Method, by Dr Evelyn Billings and Dr Ann Westmore, Penguin Books, first published 1980, new edition 2011.

Copyright © 2015

billingsMentor was first released as a web service in 2009 and has been under continuous monitoring, improvement and development. The first cell phone app was released in 2015.