As of 29 Oct 2026, OB Calc (nube) is #98 in Grossing · Medical in Spain, the one tracked chart it's in. Its best rank in the last 7 days was #64 in Grossing · Medical in Canada.
Current rank
#98Spain · Grossing · Medical
- Was
- —7 days ago
- Change
- Not enough history yetover 7 days
- Best
- #98in 7 days
- Longest chart run
- 1 daySpain · Grossing · Medical
- New ratings, 7 days
- —Needs a week of rating history
What's new
Version 2.10.1 · 3 months ago
Support for the latest Liquid Glass features
Ranking events
- Entered the Grossing · Medical chart at #98Spain
- Entered the Grossing · Medical chart at #64Canada
- Dropped #67 → #93 in Grossing · MedicalIndia
- Entered the Grossing · Medical chart at #67India
About
While similar to a pregnancy wheel, OB Calc (cloud) is specifically designed by an obstetrician, for obstetricians. Finally obstetricians have an efficient and simple method to calculate the important test date windows for patients. CALCULATION METHODS • Last Menstrual Period (LMP) • Expected Delivery Date (EDC) • Sonogram Date and Fetal Age (Sonogram) • Crown Rump Length (CRL) • In Vitro Fertilization (IVF) Try the app for free for 7 days. A low monthly autorenewable…
Ranks come from Apple's public App Store charts, checked once a day. Appulse Index isn't affiliated with Apple.
Rank history
Higher on the chart is better: #1 is at the top.
Sign in to see 30 days, 90 days and all history.
Spain · Grossing · Medical: best #98, latest #98, over 7 snapshots since 23 Oct.
In 1 chart now
| Chart | Rank | 24 h | 7 days | Best | Days on chart |
|---|---|---|---|---|---|
| Spain· Grossing · Medical · best #98 · 1 day | #98 | New entry | Not enough history yet | #98 | 1 |
Competitors
Full chartTop of Grossing · Medical in Spain. OB Calc (nube) is #98 there. Changes are over 7 days.
- #1 (number one)Up 17 places
MSK Sono: Ultrasound GuideThe Bold Apps - #2Down 1 place
Guía MensaGARMENMED, SCP - #3Down 1 place
Pregnancy + | Tracker AppPhilips Digital UK Limited - #4Up 23 places
IMAIOS e-AnatomyIMAIOS - #5Up 1 place
Huckleberry: Baby TrackerHuckleberry Labs Inc. - #6Up 2 places
Pregnancy Tracker・App by MomsWachanga LTD - #7Down 4 places
SnoreLab : Record Your SnoringReviva Softworks Ltd - #8Down 3 places
Anatomy Learning - 3D Atlas3DMedical OU - #9Up 4 places
Hilo Blood Pressure CompanionAktiia SA - #10Up 15 places
PhotoDocWiseminer - #11Down 7 places
LactAppFEM HEALTH, SL - #12New entry
Blood Sugar & Diabetes MonitorIon Cebotari - #13Not enough history yet
Eko: Digital Stethoscope + ECGEko Health, Inc. - #14Down 3 places
NYSORA Nerve BlocksNYSORA inc. - #15Up 1 place
ECG+ | Your Watch ECG ReaderHeartworks Pty Ltd - #16Up 45 places
Full Code Medical SimulationFull Code Medical Inc. - #17Up 14 places
Noxogy : Sleep & Snore TrackerApirox, s.r.o. - #18Up 3 places
My Baby Heart Sounds AppAESTHETIC WIDGETS LTD - #19Down 4 places
Sanford Guide AntimicrobialAntimicrobial Therapy, Inc. - #20Up 8 places
Human Anatomy Atlas 2027Visible Body Apps
Screenshots
As of 29 Oct 2026, OB Calc (nube) is #98 in Grossing · Medical in Spain, the one tracked chart it's in. Its best rank in the last 7 days was #64 in Grossing · Medical in Canada.
Store listing
How the app presents itself on the App Store. Select a screenshot to open it full size.
App facts
What Apple publishes about this app. Ratings are from one country's App Store.
- Price
- Free
- Released
- 29 Jan 2020
- Last update
- Version 2.10.1
- Requires
- iOS 18.0or later
- Size
- 14.6 MB
- Languages
- 5
Rank history
Higher on the chart is better: #1 is at the top.
Sign in to see 30 days, 90 days and all history.
Spain · Grossing · Medical: best #98, latest #98, over 7 snapshots since 23 Oct.
Current rankings
Every chart this app is in right now, best position first.
| Chart | Rank | 24 h | 7 days | Best | Days on chart |
|---|---|---|---|---|---|
| Spain· Grossing · Medical · best #98 · 1 day | #98 | New entry | Not enough history yet | #98 | 1 |
Ranking events
Entries, big moves, #1s and new versions we've recorded, by day.
- Entered the Grossing · Medical chart at #98Spain
- Entered the Grossing · Medical chart at #64Canada
- Dropped #67 → #93 in Grossing · MedicalIndia
- Entered the Grossing · Medical chart at #67India
Competitors
Full chartTop of Grossing · Medical in Spain. OB Calc (nube) is #98 there. Changes are over 7 days.
- #1 (number one)Up 17 placesMSK Sono: Ultrasound GuideThe Bold Apps
- #2Down 1 placeGuía MensaGARMENMED, SCP
- #3Down 1 placePregnancy + | Tracker AppPhilips Digital UK Limited
- #4Up 23 placesIMAIOS e-AnatomyIMAIOS
- #5Up 1 placeHuckleberry: Baby TrackerHuckleberry Labs Inc.
- #6Up 2 placesPregnancy Tracker・App by MomsWachanga LTD
- #7Down 4 placesSnoreLab : Record Your SnoringReviva Softworks Ltd
- #8Down 3 placesAnatomy Learning - 3D Atlas3DMedical OU
- #9Up 4 placesHilo Blood Pressure CompanionAktiia SA
- #10Up 15 placesPhotoDocWiseminer
- #11Down 7 placesLactAppFEM HEALTH, SL
- #12New entryBlood Sugar & Diabetes MonitorIon Cebotari
- #13Not enough history yetEko: Digital Stethoscope + ECGEko Health, Inc.
- #14Down 3 placesNYSORA Nerve BlocksNYSORA inc.
- #15Up 1 placeECG+ | Your Watch ECG ReaderHeartworks Pty Ltd
- #16Up 45 placesFull Code Medical SimulationFull Code Medical Inc.
- #17Up 14 placesNoxogy : Sleep & Snore TrackerApirox, s.r.o.
- #18Up 3 placesMy Baby Heart Sounds AppAESTHETIC WIDGETS LTD
- #19Down 4 placesSanford Guide AntimicrobialAntimicrobial Therapy, Inc.
- #20Up 8 placesHuman Anatomy Atlas 2027Visible Body Apps
- #98New entryOB Calc (nube)This app
About
From the app's App Store listing.
While similar to a pregnancy wheel, OB Calc (cloud) is specifically designed by an obstetrician, for obstetricians. Finally obstetricians have an efficient and simple method to calculate the important test date windows for patients.
CALCULATION METHODS
- Last Menstrual Period (LMP)
- Expected Delivery Date (EDC)
- Sonogram Date and Fetal Age (Sonogram)
- Crown Rump Length (CRL)
- In Vitro Fertilization (IVF)
Try the app for free for 7 days. A low monthly autorenewable…
What's new
Version 2.10.1 · 21 Jul 2026 ·
Support for the latest Liquid Glass features
Ranks come from Apple's public App Store charts, checked once a day. Appulse Index isn't affiliated with Apple.