Daysy is a global fertility-tracking brand by Valley Electronics that makes science-backed, easy-to-use ovulation monitors and menstrual-cycle devices. Founded from decades of med‑tech development, Daysy’s goal is to give people reliable, non‑hormonal tools to understand their cycles and make informed reproductive-health decisions—from puberty to menopause.

We design and sell medical-grade fertility trackers (Daysy, Lady‑Comp and Teena) that combine precise temperature sensors with proprietary algorithms. Our devices detect subtle basal body temperature changes to identify fertile and non‑fertile days quickly—typically in under 60 seconds per day.

Backed by 40+ years of research and analysis of millions of cycles, our technology is clinically validated and used by over 500,000 users worldwide. We prioritise accuracy (reported 99.4% identification of fertile/non‑fertile days), privacy (cycle data is stored on the device), and user support, offering free cycle analysis and expert guidance.