About PeriodTracks
A free, private period and ovulation calculator built to help people understand their menstrual cycle — without giving up their health data.
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🎯 Our Mission
PeriodTracks was created with one simple belief: your menstrual health data belongs to you. Most period tracking apps collect intimate health information and monetize it — often selling it to advertisers, insurers, or data brokers.
We built PeriodTracks differently. All cycle calculations happen locally in your browser using established medical formulas. Nothing is sent to our servers. No account is required. Your data never leaves your device.
Privacy First
All calculations happen 100% in your browser. We never store, sell, or share your health data. No account required. No cookies tracking your cycle.
Science-Backed
Our predictions use the clinically validated Ogino-Knaus calendar method. We show you the math — your next period date, ovulation day, and fertile window calculated transparently.
Built with Care
We understand menstrual health is deeply personal. PeriodTracks is designed to be warm, non-judgmental, and genuinely useful — whether you're trying to conceive, avoid pregnancy, or just understand your body better.
Always Free
Period tracking should be accessible to everyone. PeriodTracks is and always will be free to use. No premium tiers, no paywalls — just helpful tools.
📋 Our Editorial Standards
PeriodTracks publishes health information. We take accuracy seriously.
- ✓All health information is based on established medical literature and clinical guidelines.
- ✓Articles are reviewed for accuracy before publishing.
- ✓We cite authoritative sources including ACOG, NHS, and Mayo Clinic where applicable.
- ✓Our content is updated regularly to reflect current medical understanding.
- ✓We clearly distinguish between estimates and medical advice.
🛠️ Our Tools
Period Calculator →
Predict your next period date, ovulation window, and fertile days.
Due Date Calculator →
Calculate your estimated due date based on your last period.
How It Works →
Understand the science behind our cycle prediction formulas.
FAQ →
Answers to the most common questions about period tracking.
Health Blog →
Expert articles on menstrual health, ovulation, and wellbeing.
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