STARTER KIT CONTAINS: 3-MONTH subscription to the Natural Cycles birth control app, 15 Clearblue Digital Ovulation Tests, 1 Digital Basal Thermometer, 1 Clearblue Reader FDA-CLEARED, HORMONE-FREE BIRTH CONTROL APP: Natural Cycles is an FDA-cleared, non-hormonal, non-invasive birth control method which helps you manage your fertility BIRTH CONTROL WITHOUT HORMONAL SIDE EFFECTS: No side effects with Hormone-Free Birth Control. Helps to manage your fertility on your terms, with tools designed to fit your lifestyle TAKE CONTROL OF YOUR CYCLE: The NC algorithm uses your temperature to pinpoint your fertile days to help you prevent pregnancy 93% EFFECTIVE: Natural Cycles is clinically proven to be 93% effective with typical use (1). Other than abstinence, no method of birth control is 100% effective BACKED BY SCIENCE: The NC algorithm uses basal body temperature (BBT) to identify fertile and non-fertile days and to confirm ovulation. Taking ovulation tests is optional and can help the NC algorithm predict your ovulation day IDENTIFY THE MOST FERTILE DAYS: Use Clearblue Digital Ovulation Tests to identify the surge in luteinizing hormone (LH). This happens 24-36 hours before ovulation to identify your 2 most fertile days