Neli: Period Tracker & Cycle

Track your period, understand your cycle, and plan ahead with Neli. This easy-to-use menstrual cycle calendar helps you log period dates, predict your next period, estimate ovulation and fertile days, record PMS symptoms and moods, and follow cycle changes over time.

Your cycle information is stored on your device, and no account is required to start.

PERIOD TRACKER & CYCLE CALENDAR

Use Neli as a clear period calendar to manage your current cycle and review your history.

• Log period start and end dates
• Check your current cycle day
• See predicted period days
• Review previous periods and cycle history
• Track regular and irregular cycles
• View average cycle length and period duration

OVULATION & FERTILITY TRACKER

Use the ovulation tracker to follow estimated fertile days based on the cycle information you enter.

• View your predicted ovulation day
• Follow your estimated fertile window
• Log basal body temperature
• Review fertility and cycle patterns

Ovulation and fertile-window predictions are estimates and must not be used as contraception.

PMS, MOOD & SYMPTOM TRACKER

Turn Neli into your daily period diary.

• Record symptoms and moods
• Review your symptom history
• Notice patterns across menstrual cycles

CYCLE INSIGHTS & HISTORY

Bring your periods, fertile days, ovulation estimates, symptoms, and cycle history together in one organized calendar. Explore:

• Average cycle length
• Average period duration
• Previous and predicted periods
• Symptom patterns
• Cycle charts and trends

PREGNANCY TRACKER

Switch to pregnancy mode when you need it.

• Follow pregnancy week by week
• See your current pregnancy week
• Track trimester progress
• View your estimated due date
• Keep pregnancy notes organized

Download Neli: Period & Cycle Tracker to keep your menstrual cycle, ovulation estimates, fertile window, symptoms, and pregnancy timeline organized in one place.

Medical disclaimer: Neli is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. Period, ovulation, fertile-window, and pregnancy calculations are estimates for personal tracking and educational purposes only. They should not be used as contraception. Always consult a qualified healthcare professional for medical advice, diagnosis, or treatment.