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.