It's the question doctors ask when your iron runs low — and most of us can only shrug. PeriodVol turns the pads, tampons and cups you log into an estimated volume in millilitres, and shows each cycle against the 80 ml line used to define heavy menstrual bleeding (HMB). Estimates — not a diagnosis.
Or try it right here in your browser →From your first period to menopause you'll bleed around 450 times across nearly 40 years — yet hardly anyone measures how much. Earlier first periods and later pregnancies mean longer lifetime exposure to oestrogen — and uterine conditions keep rising. Gynaecologists classify the causes of abnormal bleeding with a standard system, PALM-COEIN, and the first signal is almost always a change in how much you bleed, or bleeding between periods.
20–30% of women of reproductive age — up to 70–80% by their 50s. Submucosal fibroids can drive a dramatic jump in flow even when small.
The uterine wall thickens and can't contract to stop bleeding well — causing heavier flow and severe cramps.
An abnormally thick lining means heavier flow and bleeding between periods. One of the top gynaecologic cancers — and rising.
The opposite signals too: very light flow or months without a period can point to an ovarian or uterine condition.
Endometriosis affects around 10% of women of reproductive age and is a leading cause of infertility — increasingly diagnosed in women in their early 20s. Regular check-ups matter even without symptoms.
Don't wait if… you soak through a pad in 1–2 hours, pass large clots often, bleed for more than 8 days, or your flow has more than doubled — especially alongside fatigue, dizziness, breathlessness or pale skin (signs of anaemia). Ask for a gynaecologic ultrasound.
From a quick daily tap to a number you can finally show a doctor.
“Before my iron infusion, the haematologist asked: ‘Are your periods heavy?’ I had no idea — and nothing to show her. So I built PeriodVol to turn my flow into a number I could bring to a doctor.”
Logging takes seconds — PeriodVol does the millilitre math for you.
A pad (by size & how soaked), a tampon, or a menstrual cup (by capacity & fill). Add clots or flooding too.
Each product becomes an estimated volume. Your day and whole-cycle total add up automatically.
A cylinder marks the 80 ml line. Cross it and PeriodVol flags it — so you can talk to a doctor with real numbers.
Clinicians estimate flow with paper charts (the PBAC). PeriodVol is the only consumer period app we know of that turns what you log into estimated ml — automatically.
The clinical line where bleeding is defined as heavy (HMB). PeriodVol marks it so you can see where your cycle sits — a line, not a verdict.
After a few cycles, your next period, ovulation & fertile window — right on the calendar.
A printable cycle summary with FIGO ranges & a PBAC-equivalent score — bring it to an appointment.
No account — your entries stay on your device; only anonymous usage pings and opt-in cycle summaries are ever sent. No ads, no third-party trackers, never sold.
Core tracking is free on iOS, Android & web. An optional one-time Pro unlocks the doctor report.
PeriodVol is local-first by design: no account, no sign-up — your entries stay on your device, and only anonymous usage pings and opt-in cycle summaries are ever sent. Lock it with a PIN or Face ID, export or delete anytime. Because how much you bleed is nobody's business but yours.
Free to start. Estimates, not a diagnosis — but no more shrugging.
Or open the web app →