Due Date Doctor: OB Wheel EDD

Free. No ads, no subscription. 36 OB/GYN calculators by a physician: due date, gestational age by LMP, CRL and IVF, fetal weight, Bishop, Apgar, contractions. Offline.

Free. No ads, no subscription, no account. Works offline.

Due Date Doctor puts 36 OB/GYN calculators and a personal pregnancy tracker in one app. Built for obstetricians, midwives, residents and expectant mothers.

FOR CLINICIANS AND MIDWIVES • OB wheel: EDD and gestational age from LMP, ultrasound, CRL or IVF transfer • ACOG redating rules in the ultrasound and CRL tools • Search by abbreviation: CRL, EDD, GTT, ROMA • Favorites and recent tools • Copy or share any result in one tap • Sources for every formula, inside the app • Siri, Shortcuts and Spotlight search for tools and drugs

FOR EXPECTANT MOTHERS • My Pregnancy: gestational age today from LMP, due date, ultrasound or IVF • Pregnancy week by week: how the baby grows and what changes for you • Key dates: screenings, glucose test at 24–28 weeks, anti-D, maternity leave • Gestational age on any date • Weight log with the healthy gain range • Kick counter: count to 10 (Cardiff) or 1-hour mode (Sadovsky), with reminders • Contraction timer: duration, interval and when to go to the hospital. Live Activity on the lock screen • Home Screen and Lock Screen widget with gestational age and due date • Cycle tracker: periods, ovulation, symptoms, basal body temperature and Apple Watch wrist temperature. Forecasts as a date range with a confidence level • "When to see a doctor" tips based on clinical guidelines, a doctor report and a "Show your doctor" screen • Irregular cycle and PCOS mode, pain diary, symptom forecast • Log with Siri, a widget or Control Center. Backup to a folder you choose, Apple Health sync and Face ID lock

36 CALCULATORS

Pregnancy dating • Week-by-week pregnancy calendar • By LMP (Naegele's rule) • By ultrasound • By ovulation • IVF and frozen embryo transfer due date • By quickening • Kick counter (Cardiff, Sadovsky) • By first visit • Maternity leave dates • Reverse due date • GA from first-trimester screening

Ultrasound • CRL dating • Fetometry: BPD, HC, AC, FL • Fetal Doppler (Barcelona protocol): umbilical artery, MCA, CPR, uterine arteries, FGR stages

Prenatal care • hCG: doubling time, norms by week and DPO, after transfer • Glucose tolerance test: normal, GDM or overt diabetes • Pregnancy weight gain by BMI, singletons and twins • Preeclampsia risk and aspirin indication (Russian Ministry of Health 2024, ACOG, NICE)

Fetal weight • All formulas side by side • By maternal anthropometry • Rudakov method • Stroykova formula • By ultrasound (Hadlock, Shepard) • Fetal weight by week with percentiles

Labor and delivery • Bishop score • VBAC before labor and VBAC in labor • Oxytocin dose and rate • Cervical ripening and labor induction guide • Contraction timer • Apgar score

Gynecology • Breast cancer risk (Gail model) • Cervical cancer risk (cytology and HPV) • Follow-up after colposcopy and CIN treatment • Ovarian cancer risk (ROMA)

Reference • Medications in pregnancy: 217 drugs in 4 groups (safe, use with caution, avoid, contraindicated)

WHO MADE IT Maria Arutunyan, MD, OB/GYN resident at Pirogov Russian National Research Medical University, Moscow. Developer Narek Maloyan publishes the app on her behalf.

Every formula comes from its primary source: Hadlock, Robinson, Bishop, Apgar, Gail, Grobman, ROMA, and the ACOG, NICE and Russian Ministry of Health guidelines. Each calculator lists its references, and Settings has the full methodology.

YOUR DATA • Everything stays on your iPhone. There is no server • No account, no analytics, no ads • Apple Health data never leaves the device • Lock the cycle tracker with Face ID

Languages: English and Russian.

Important. The app is a reference tool for clinicians and expectant mothers. It does not diagnose and does not replace your doctor. If your baby moves less than usual, contact your doctor or maternity unit right away. Do not wait.

Website: https://arutunyan.doctor/