MomoCalendar

Log your last period once — get auto predictions for next period, fertile window, and ovulation day. Track flow, pain, mood, pill & relations. PIN-locked.

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.