Period-Calculator.net
ツール、ヘルス、フェムテック、ピリオドトラッカー、プライバシーファースト、女性の健康
説明
** Period-Calculator.net **は、ユーザーが次の月経期間、排卵日、肥沃な窓を予測できるように、シンプルでプライバシー中心のツールです。 It only requires 3 inputs:
- Last period start date
- Period length (e.g. 5 days)
- Average cycle length (e.g. 28 days)
Once submitted, users see:
- Next predicted period dates
- Estimated ovulation day
- Fertile window
- A color-coded monthly calendar with:
- 🩸 pink background and heart icon for period days
- 👶 green background and baby face icon for ovulation day
Built with **Next.js and server-side rendering (SSR)** for SEO and speed. All calculations happen locally in the browser — we **never store or send any personal data**.
Optimized for global mobile users (90%+ mobile traffic), the site is lightweight, fast-loading, and respects user privacy by design.