MomoCalendar

Never wonder when your next period is coming again.

MomoCalendar is the simplest cycle tracker. Log your last period start date once, and the app auto-predicts your next period, fertile window, and ovulation day. Track flow, pain, mood, contraception, and intimate relations privately — all in one beautiful calendar.


[ Key Features ]

▶ Smart Predictions
• Auto-predict next period, fertile window, ovulation day
• Personalized average cycle / period length (fully customizable)
• Toggle fertile window display ON / OFF

▶ Daily Logging
• Flow level (none, light, normal, heavy)
• Pain score 0–10
• Multi-select symptoms (headache, cramps, bloating, acne, and more)
• Mood (good, calm, sensitive, sad, anxious)
• Free-form memo

▶ Pill & Relations
• Separate logs for oral contraceptive + emergency contraception
• Private log for protected / unprotected relations

▶ Calendar + Statistics
• Beautiful month view at a glance
• Visualize symptom, mood, pill, and relation patterns over time
• Track average cycle length + prediction accuracy

▶ Reminders & Security
• Period start, ovulation day, and daily log reminders
• PIN-protected app lock — no one can open it without your code
• Light / dark theme + Korean / English UI


[ Made For You If ]

• Your cycle is irregular and predictions matter
• You're using natural family planning or trying to conceive
• You keep forgetting your daily pill
• You want to see symptom + mood patterns in real data
• You're tired of ad-stuffed, feature-bloated trackers


[ Privacy First ]

• Your data is encrypted in transit and tied to your account only
• No third-party sharing beyond ad personalization
• Full data deletion on account removal (server + device)
• PIN lock keeps your data safe even if your phone is lost


[ Account & Sync ]

• Sign in with Google, Apple, or Email
• Auto-sync across device changes or reinstalls


[ Contact ]

• Feedback: siwooeo@gmail.com
• Website: https://www.reactiveworks.dev

MomoCalendar is not a substitute for medical diagnosis or treatment. Always consult a qualified OB/GYN for any concerning symptoms.