Free, anonymous calculators for your period, fertility, and cycle health. No sign-up. No app. Just answers — calculated in your browser and forgotten the moment you close the tab.
When is your next period due? Enter your last period date and cycle length for a prediction.
→ ⏰How many days late are you — and what does it mean? Calm, factual answers.
→ 📊Compare your cycle length and period duration against the global average.
→ 🩸Light, medium or heavy? See how your flow compares and when to seek advice.
→ 🌙How does your cycle change from your teens through to perimenopause?
→Score your PMS symptoms and see how they compare. Know when it crosses into PMDD.
→ 🔄What phase are you in? Get tailored energy, mood, food, and exercise tips by phase.
→ 🏃The best workouts for each phase of your cycle — work with your hormones, not against them.
→ 😴How your cycle affects sleep quality — and what to do in each phase to sleep better.
→All calculations run in your browser. Your dates and cycle data never touch our servers.
Skip the sign-up. No email, no password, no profile to delete later. Just use it.
No cookies tracking your cycle. Refresh and there's no trace. The way the internet used to feel.
"Cycle awareness isn't a problem to manage. It's information you've always had a right to."