The latest app being downloaded by young women looking to get laid isn’t an upgraded Tinder or rehashed Hinge. It’s a new form of contraception.
Here’s how it works: Natural Cycles sends you a thermometer in the mail that you use to measure your basal body temperature first thing in the morning. Your temperature changes during the menstrual cycle and can be used to detect ovulation and identify your fertile—and infertile—windows. So, after logging your temperature into the app each day for roughly three months, the app’s algorithm gives you either a helpful green day (go ahead and raw dog it) or a red day (wrap up that sausage).
