루나데이 - 생리달력 배란일 호르몬 캘린더 AI상담

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About this app

🌸 Luna Day — Period Calendar, Period Cycle, Ovulation Date, Fertile Period, and Expected Period All in One

It’s not just a simple date record. It analyzes the reasons for your varying condition each month and the stages of hormonal change to inform you of your body's condition today.

🤖 AI provides a personalized condition guide every day for free. Start smart cycle management with Luna Day now.

Manage your monthly cycle smartly with the Luna Day period calendar.

It automatically calculates your expected period date, ovulation date, and fertile period, and allows you to check hormonal changes and your condition along with your menstrual cycle at a glance.

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✅ Key Features

📅 Smart Period Calendar & Period Prediction

• Automatically predicts your next period cycle just by entering your period start date

• Check your period date, ovulation date, and fertile period at a glance on the calendar

• Get advance notice of your next month's expected period date with accurate predictions

• Predictions become more accurate as it learns your cycle patterns with accumulated records

🔬 Hormonal Change Analysis

• Displays Estrogen, Progesterone, and LH hormone levels

• Guides you on changes in energy, mood, and creativity by cycle

• Scientifically understand your body's condition

🤖 AI Condition Analysis

• AI provides a personalized analysis of your condition today

• Provides tips on mood, dating, diet, energy, and exercise

• Recommends lifestyle guides tailored to your cycle stage

📊 Cycle Statistics

• Check your cycle trends with data

• Analyzes symptom patterns and tracks mood changes

• Predictions become more accurate as cycle records accumulate

🔔 Personalized Notifications

• Period Advance notifications for due dates and ovulation

• Smart push notifications you won't miss

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💡 Recommended for:

• Those who want to manage their menstrual cycle systematically

• Those who want to record patterns of Premenstrual Syndrome (PMS) and menstrual cramps

• Those who want to understand their condition based on hormonal changes

• Those who want to identify their ovulation date and fertile period for pregnancy planning or contraception

• Those who want to receive notifications for their D-day every month without forgetting

• Those who want a simple and pretty period calendar

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💎 Luna Day Premium

Most features are available for free.

With Premium, the following additional benefits are unlocked:

• Clean, ad-free interface

• Unlimited AI health consultations (Free offers 5 per day)

• Advanced statistics including 6-month trend analysis

• PDF health reports (useful for doctor visits)

• Unlimited sharing with partners

Price:

• Monthly: 1,500 KRW / month

• Annual: 12,000 KRW / year (33% discount · equivalent to 1,000 KRW per month)

Subscriptions renew automatically, and you can cancel at any time in your Google Play account settings up to 24 hours before renewal.

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🌷 The Uniqueness of Luna Day

✨ Clean and Intuitive UI

A simple design focused on core functions without complex menus.

You can instantly check your cycle status just by opening it.

✨ Science-Based Hormone Information

You can better understand your body through condition analysis based on hormonal changes, rather than simple date calculations.

✨ AI Personalized Analysis

AI analyzes your energy, mood, diet, and more in a personalized way based on your cycle phase.

✨ Privacy First

Cycle data is stored on your device by default and syncs to the cloud only when you log in.

We never sell your personal information.

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📱 Install Luna Day right now and start managing your cycle smartly!

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※ The menstrual cycle prediction, ovulation date, and hormone information in this app is for statistical reference only and does not replace a medical diagnosis. Please consult a doctor for any health-related decisions.
Updated on
Jun 3, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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What’s new

- 데이터 복원 안정성을 추가로 강화했어요. 일부 기록이 화면에 안 보이던 문제를 더 폭넓게 방지합니다.
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App support

About the developer
이병창
lasjk7@gmail.com
서울특별시 관악구 남부순환로 164길 9, 202호 (신림동) 202호 관악구, 서울특별시 08773 South Korea

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