• Take Control of Your Fertility with Daysy — A hormone-free, precision fertility tracker. Easily predict your fertile and non-fertile days with the help of its free app, empowering you to make informed decisions about your health and family planning.
• Know Your Fertility Status in an Instant — Daysy uses a simple red (fertile) or green (not fertile) light to clearly show when you’re most likely to conceive, making it easier than ever to track your cycle.
• Crafted in Germany & Designed in Switzerland — Daysy brings over 40 years of research and innovation to your fingertips. Trust a family-run company dedicated to giving you accurate, cutting-edge fertility insights.
• Accurate Results You Can Count On — With a stunning 99.4% accuracy, Daysy reliably identifies your fertile and non-fertile days, making it your go-to tool for smart family planning and cycle tracking. Say goodbye to guesswork and hello to certainty.
• Forget About Subscriptions! — Daysy’s free app is all you need for tracking your cycle. By combining basal body temperature with advanced algorithms, it provides personalized fertility insights, going far beyond simple period tracking.

• Product Dimensions ‏ : ‎ 1.81 x 1.89 x 0.87 inches; 1.41 ounces
• Batteries ‏ : ‎ 1 CR2032 batteries required. (included)
• Date First Available ‏ : ‎ November 7, 2017
• Manufacturer ‏ : ‎ Valley Electronics AG
• Country of Origin ‏ : ‎ Germany