Health information

What Period Vault does

Period Vault is a diary for your cycle. You log your periods and symptoms. The app shows your estimated next period. If you turn it on, it also shows an estimated ovulation day.

How the predictions work

The app averages the lengths of your recent cycles. It adds that average to the start of your last period to estimate your next period. It estimates ovulation as the day 14 days before your next estimated period. That is a rule of thumb. Your body may not follow it. Stress, illness, travel, sleep, medicines, breastfeeding, pregnancy, perimenopause and many health conditions can change your cycle. The estimates can be wrong by days, and more so if your cycles vary.

What Period Vault is not

• It is not a medical device. It does not diagnose, treat, cure or prevent any condition.
• It is not birth control. Do not use it to avoid pregnancy or to plan one.
• The ovulation estimate is not a prediction of when you can or cannot get pregnant. It cannot confirm a pregnancy.
• It does not replace a doctor, nurse, midwife or pharmacist.

See a doctor or nurse if you notice

• Very heavy bleeding. For example you change a pad or tampon every 1 to 2 hours, you pass clots bigger than about 2.5 cm, or your period lasts more than 7 days.
• Cycles shorter than 21 days or longer than 35 days. Teenagers in their first years of periods often have cycles of up to 45 days, but ask if you are unsure.
• No period for 3 months in a row when you are not pregnant.
• Bleeding between periods or after sex.
• Any bleeding after menopause, even a small amount or only once.
• Severe pain, or period pain that stops you doing your usual things.
• A positive or possible pregnancy, or a missed period when pregnancy is possible.

Get urgent help now if

• Your pelvic or period pain is severe or worse than usual and pain relief does not help.
• You bleed very heavily and feel dizzy, faint, short of breath or weak.

In an emergency call your local emergency number.

Your data

Your entries stay on your phone. Period Vault has no account and no server for your cycle data. Read the privacy policy for the details.

Sources

This guidance follows public health information from the NHS (nhs.uk: Periods, Heavy periods, Period pain, Post-menopausal bleeding).