Eos is a 100% free, private period and fertility tracker designed for women who want accurate predictions without compromising their health data.

🔒 YOUR DATA NEVER LEAVES YOUR PHONE

Most period apps make money from your most personal health data. Several major period tracking apps have faced regulatory investigations and public controversy over how they handle reproductive health information. Eos is different — no account required, no cloud sync, no third parties. Everything stays on your device. Your cycle is yours.

🌸 PERIOD TRACKING
• Accurate period predictions personalised to your unique cycle
• Customisable cycle length and period duration
• Flow intensity, spotting, and discharge tracking
• Smart period reminders and notifications

🥚 FERTILITY & OVULATION
• Fertile window calculation (up to 6 fertile days per cycle)
• Daily fertility score and ovulation day prediction
• Ideal for trying to conceive or avoiding pregnancy naturally
• BBT basal body temperature logging

📊 CYCLE PHASES & WELLNESS
• Understand your menstrual, follicular, ovulatory, and luteal phases
• Your cycle is your fifth vital sign — track how hormones affect energy, mood, and focus
• Log symptoms: cramps, headaches, bloating, breast tenderness, mood, sleep, and more
• Insights that learn and improve with your personal data over time

🔮 SMART PREDICTIONS
• Adapts to your unique cycle patterns over time
• Predicts your next 12 periods ahead
• Works even with irregular cycles

💊 CYCLE HEALTH PRODUCTS
Discover recommended period care essentials, cycle tracking journals, fertility supplements, prenatal vitamins, and self-care comfort products via our website.

🆓 100% FREE. NO SUBSCRIPTION. NO PAYWALL. NO DATA SOLD.

Download Eos today and take back control of your cycle — privately.