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Period Tracker — Next Period, Ovulation & Fertile Window

Free private period tracker. Estimate your next period, ovulation and fertile window without signup.

Your cycle data stays on this device — JugadTools does not upload your health information. It can only leave your device when you explicitly share or export it.
No signup required Health data not uploaded Stored locally only

🌸 Enter Your Cycle Details

Select the first day your last period started.
Count from the first day of one period to the first day of the next. 28 days is a common average — yours may differ.
Number of days bleeding usually lasts.
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Cycle Day
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ESTIMATED
Next Period
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ESTIMATED
Ovulation Day
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ESTIMATED
Fertile Window
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Your Current Phase

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📅 Estimated Cycle Calendar

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Period days
Estimated fertile window
Estimated ovulation
Today
Important: This is an estimate and should not be used as the only method of contraception. Ovulation timing can vary significantly.

📋 Next 6 Estimated Periods

💡 How is this calculated?
  • Next period is estimated by adding your cycle length to your last period start date.
  • Ovulation is commonly estimated at approximately 14 days before the next expected period (cycle length − 14).
  • Fertile window is estimated as 5 days before through 1 day after ovulation.
  • Real ovulation timing varies and may not follow this formula exactly.
  • Predictions may be less accurate for irregular cycles, postpartum or breastfeeding, perimenopause, or hormonal contraception users.

📊 Cycle History

Add past period start dates to calculate your average cycle length and see patterns.

⚕️ PCOS Symptom Awareness Check

This short questionnaire can highlight symptoms worth discussing with a healthcare professional. It cannot diagnose PCOS or any other condition.

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    This questionnaire cannot diagnose PCOS. Only a qualified healthcare professional can diagnose PCOS through clinical examination and tests.

    ⚕️ Medical Information

    JugadTools provides estimates for informational purposes only. This is not a medical diagnosis, treatment recommendation, or substitute for advice from a qualified healthcare professional. All predictions are estimates based on average cycle patterns — individual cycles vary significantly.
    When to seek medical advice
    • Periods that suddenly become very irregular after being regular
    • No period for 3 or more months (when not pregnant)
    • Periods that are extremely painful or very heavy
    • Bleeding lasting longer than 7 days regularly
    • Spotting between periods
    • Any symptoms that concern you

    This is general guidance only. Please consult a doctor or gynaecologist for personal medical advice.

    Trusted Sources

    NHS — Periods (nhs.uk) WHO — Polycystic Ovary Syndrome FDA — PCOS Women's Health Topics
    Content last updated: August 2026. This page has not been reviewed by a named medical professional.

    ❓ Frequently Asked Questions

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