OB Datum: Pregnancy Dating

Transparent EDD, IVF, and gestational-age calculations

Coming soon to the App Store

Screenshots

App screenshots will be added here when available.

About the App

OB Datum is a clinician-first pregnancy-dating workspace for iPhone and iPad. Calculate from LMP, conception or ovulation, an established EDD, known gestational age, or IVF embryo transfer, then review the formula and equivalent dates behind every result. Compare dating evidence without silently changing an established due date, explore the pregnancy timeline, and save anonymous calculations locally on your device. No accounts, advertising, analytics, or tracking. Pregnancy dates and saved cases are never uploaded or synchronized through iCloud.

iPhone

iPad

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Key Features

LMP, conception, known EDD, gestational age, and IVF dating
Transparent formulas and source reconciliation
Interactive pregnancy timeline and wheel
Protected local-only anonymous saved cases
Optional read-only Health import and reviewed Calendar export