Our Mission: Transparency & Precision
Eisprungrechner.online was developed with a simple goal: to provide women and couples with the most precise, privacy-friendly, and medically sound tools for fertility planning.
Why We Are Different
🔒 Privacy First
Your reproductive data is sensitive. Unlike many apps, we store zero data on our servers. All calculations stay on your device.
⚕️ Medical Accuracy
Our tools are based on WHO-recognized formulas and are regularly reviewed by medical specialists in gynecology.
Scientific Foundation
Our algorithms are based on the biological certainty that the luteal phase (after ovulation) is relatively constant, while the follicular phase varies.
Medical Review Team
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Medically reviewed by
Dr. Sarah SchmidtSpecialist medical training in Gynecology, 12 years of clinical experience
Medically VerifiedUpdated: 2026-03-01