Based on innovative fertility awareness algorithms, hardware and mobile app, shecare fertility tracker automatically collects women's basal body temperature and identifies their fertility window intelligently. Unlike traditional medical devices, shecare 1) has a shape like a lipstick, so it is easily hidden into cosmetic bag protecting privacy; 2) has a simple and smart color indicator on top to show the fertility status; 3) utilizes gentle vibration reminder instead of beeping buzzer; 4) provides a LED screen with no need to open an app; 5) is made from biocompatible thermoplastic elastomer, polycarbonate material and offers a soft tip under user’s tongue to achieve better experience.