Fertility Monitor – Natural Hormone-Free Ovulation Monitor & Fertility Awareness Device – Accurate BBT Tracking & Ovulation Detection – Non-Invasive, App-Free & FDA Cleared

From the brand

Welcome to Daysy and Lady-Comp – your partner for modern cycle and fertility tracking.

Our mission is to provide you with a simple, precise, and natural way to support family planning and improve your cycle health.

For over 40 years, we’ve been combining innovation and accuracy to help women, teens, and people who menstruate make informed decisions about their health and wellbeing.

Start your hormone-free life.

Are you trying to conceive? Planning a pregnancy or postponing it? We are always by your side.

Your cycle, your body, your well-being.

With cycle tracking, you gain a deep understanding of your body, take control of your fertility, and support your overall well-being, precisely, simply, and efficiently.

Science you can trust. Accuracy you deserve.

Backed by 40 years of research, our advanced menstrual cycle computers offer 99.4% accuracy in distinguishing between fertile and non-fertile days.

Our mission: Your health, your power.

We believe every woman deserves to understand her body. That’s why we create science-backed, intuitive solutions that put your health and autonomy first.

Choose the right cycle tracker

Is Discontinued By Manufacturer ‏ : ‎ No
Package Dimensions ‏ : ‎ 5.55 x 5.51 x 2.13 inches; 4.59 ounces
Item model number ‏ : ‎ 4002
Batteries ‏ : ‎ 1 CR2032 batteries required. (included)
Date First Available ‏ : ‎ April 4, 2014
Manufacturer ‏ : ‎ VE Valley Electronics GmbH
ASIN ‏ : ‎ B018MSJI68
Best Sellers Rank: #248,226 in Health & Household (See Top 100 in Health & Household) #22 in Basal Thermometers #41 in Fertility Tests & Indicators
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Take Control of Your Fertility, Naturally Lady-Comp is a non-invasive, hormone-free fertility monitor that tracks your daily basal body temperature to accurately identify fertile and non-fertile days—empowering you to take charge of your reproductive health.
Instant Fertility Status at a Glance With a simple red (fertile), green (not fertile), or yellow (learning phase) light display, Lady-Comp makes it easy to understand your cycle status—no guesswork, no apps, no confusion. In just 60 seconds daily, the backlit display and optional alarm help you stay on track effortlessly, every day.
Over 99% Accuracy Backed by Decades of Research Engineered in Germany, Lady-Comp combines clinical precision with over 35 years of fertility tracking expertise. This certified medical device (CE marked, FDA 510(k) cleared) uses a proprietary algorithm with 99.4% accuracy in detecting fertile and non-fertile days.
Personalized Cycle Intelligence Lady-Comp learns your unique cycle over time, offering insights into ovulation patterns, fertile windows, and hormonal imbalances. It provides a personalized 6-month fertility forecast and tracks key pregnancy milestones, including conception date and expected due date, supporting your goals—whether that’s pregnancy planning or simply body awareness.
Zero Subscriptions. Zero Hormones. Zero Hassle. 100% Private and Off The Grid Lady-Comp offers a one-time purchase with no recurring fees or subscriptions. It works without power or internet, and your cycle data stays completely private. Just a simple, science-backed tool that gives you clarity and confidence.