Fertility Friend

Fertility Friend is a fertility-tracking service operated by Tamtris Web Services Inc., helping users understand their menstrual cycles and identify their most fertile days. Established in 1998, the brand says its tools have supported more than one million pregnancies. Its tracking system uses observations such as basal body temperature and other fertility signs to create charts, calendars, and personalized interpretations. Users can access Fertility Friend through a free web app and apps for iPhone and Android, with data also integrating with Apple Health and Oura Ring.

The service offers an ovulation calculator, pregnancy-chances calculator, and test-line reader, alongside tools for exploring and comparing charts, including Chart Overlay, Chart Duo, and “Charts Like Mine.” Fertility Friend also provides educational resources such as tutorials, frequently asked questions, videos, courses, an eBook, and a podcast. A chart gallery and test-photo gallery offer additional reference material. The company highlights privacy, stating that its service has no ads, trackers, or affiliates, and provides account support and membership options for users seeking fertility insights.