OB Wheels Downloads & RevenueOB Wheels · App Store
OB Wheels is #87 in Medical Free in Indonesia and charting in 1 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperJoshua D. steinberg
CategoryMedical
PriceFree
Released
Rating★ 0.0 (0)
Version1.2
Age rating17+
First seen by us
1 Oct 2026
1 Oct 2026Installs (est.)1k+ worldwide
🔎Top 10 for “wheel”📈Entered the top 100📈Charting in a new country🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 5 events in the last 12 months
- 🔎OB Wheels reached Top 10 for “wheel”#10 in India search · popularity 50
- 📈OB Wheels entered the top 100Top Free · Medical · ID
- 📈OB Wheels charting in a new countryIndia
- 🆕OB Wheels first spotted by AppInsider#52 in Top Free · Medical · Indonesia
- 🆕OB Wheels released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
0.0 ★
0 ratings
Measured
Best rank now
#87
Medical FreeMeasured
OB Wheels on the App Store
App details
App ID
969845527
Publisher
Joshua D. steinberg
On the store since
Mar 2015
11 years on the store
Minimum OS
iOS 7.0+
Devices
iPhone · iPad
Content rating
17+
1 content note below
Languages
1
EN
Size
3 MB
Content notesFrequent/Intense Medical/Treatment Information
OB Wheels downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where OB Wheels's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Indonesia | MedicalFree | #87 |
Apps near OB Wheels on the chart
Medical Free, around #87.
Ratings
App Store, worldwide.
Rating
0.0 ★
0 ratings
Measured
Ratings
0
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
3.5★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Medical apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About OB Wheels
Does the world need another OB-wheel-due-date-calculator app? You bet! OB Wheels combines three things that clinicians need to derive all the dates necessary in pregnancy care, and no other app has this combination.
It contains a calendar calculator to determine EDD (EDC) from LMP or from a sonogram report. The calendar calculator also provides gestational age (EGA) as of any date for a given EDD or LMP. Because the calculator works off the real calendar, it is accurate for leap years too.
Then for all of you who miss your cardboard OB wheel, the app contains one which you can rotate, pinch and zoom, and generally play with just like a regular cardboard wheel. It's a little tricky to learn how to plant two fingers and rotate them rather than pinch-and-zoom to get rotation versus resizing. But the wheel works and it is accurate, especially so because you can zoom in to be sure where the little date hash lines lie.
Finally, the app notes the most recent committee opinion scheme from ACOG on how one might reconcile due dates from LMP and sonograms to arrive at a single final EDD. To my knowledge, the scheme is authority-based and no better or worse than other schemes, but my practice and my learners need a single clear scheme, so this app includes one for easy reference.
As an educator and clinician myself, I am grateful for feedback. Email me via the contact email at my website.
It contains a calendar calculator to determine EDD (EDC) from LMP or from a sonogram report. The calendar calculator also provides gestational age (EGA) as of any date for a given EDD or LMP. Because the calculator works off the real calendar, it is accurate for leap years too.
Then for all of you who miss your cardboard OB wheel, the app contains one which you can rotate, pinch and zoom, and generally play with just like a regular cardboard wheel. It's a little tricky to learn how to plant two fingers and rotate them rather than pinch-and-zoom to get rotation versus resizing. But the wheel works and it is accurate, especially so because you can zoom in to be sure where the little date hash lines lie.
Finally, the app notes the most recent committee opinion scheme from ACOG on how one might reconcile due dates from LMP and sonograms to arrive at a single final EDD. To my knowledge, the scheme is authority-based and no better or worse than other schemes, but my practice and my learners need a single clear scheme, so this app includes one for easy reference.
As an educator and clinician myself, I am grateful for feedback. Email me via the contact email at my website.
Latest updates
1.2
the due date calendar calculators!
- totally redesigned
- much easier to use
- much easier to understand
- exactly what you expect from an iPhone app
- sorry I didn't improve this app earlier (but I didn't know how, still an amateur programmer)
