Comparison

Perfect OB Wheel vs Storc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Perfect OB Wheel

This app is a comprehensive obstetrics calculator that provides detailed pregnancy information. It offers flexible input options and displays thorough results including estimated due dates, gestational ages, and fetal growth estimates.

Highlights
  • Flexible input (LMP, conception, EDC, ultrasound)
  • Fast data entry options
  • Detailed pregnancy results
  • Accurate date calculations
  • Persistence of last used data
  • Optional pregnancy tracking upgrade
Features
Currently charting
Read full description

Simple, fast, yet more thorough than any other pregnancy wheel available for the iPhone, Perfect OB Wheel is better than just a replacement for your trusty paper wheel. Here's why Perfect OB Wheel is your best choice of gestational calculator: 1) Input flexibility: Start with one of: • Last menstrual period (LMP) • Conception date • Estimated date of confinement/delivery (EDC) • Ultrasound dating: Number of weeks and days gestation as of a given date ("X Weeks"). 2) Input speed: Other wheels for the iPhone make you conform to them for entering your patient's information. Why not be able to choose based on how you are holding the phone and what else you are doing at the same time? • Use the numeric entry pad (0 3 3 0 2 0 0 8) and immediately see the results, OR • Spin the date wheel at the bottom of the screen and tap Next. 3) Thorough results: All the information you would expect from a classic wheel, plus more: • Estimated Due Date • LMP Date • Conception Date • 1st Trimester End Date • 2nd Trimester End Date • Gestational Age • Conceptional Age • Expected Fetal Length based on standard fetal growth curves • Expected Fetal Weight based on standard fetal growth curves ("How much does my baby weigh, doctor?") Results are relative to 'today' by default; this can be quickly changed to reflect any date by tapping the 'today' button and selecting a new date. 4) Accurate results: Perfect OB Wheel provides exact dates and accounts for all calendar variance, including leap years. 5) Persistence: Perfect OB Wheel remembers the date and date type you last used and restores them when launched to streamline your workflow. 6) Perfect OB Tracker upgrade: Available as an in-app purchase update, the Perfect OB Tracker lets you track any number of pregnancies, with at-a-glance due date and gestational age and one-tap access to all the data Perfect OB Wheel provides. A picture and text notes can be kept on each patient. Postpartum tracking is also available. Passcode locking is available for HIPAA compliance.

About

Storc

Features
Read full description

Storc is an OBGYN patient tracker designed to make managing all of your patients, information and appointments as easy as possible through our app. All information including patient information, delivery dates synced to your calendar and more are managed in the cloud so you never have to worry about losing any of your important data. We are currently building a personal web dashboard that can do everything your app can do (plus extras such as viewing your statistics) all from your desktop, which syncs in real time with your app so information is always kept up to date and can be managed by your secretaries! Terms of Service (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://mystorc.com/PrivacyPolicy

Screenshots

Perfect OB Wheel4 screens
Storc4 screens

Verdict

The call

The clearest difference is price: Storc at Free against Perfect OB Wheel's $1.99. Perfect OB Wheel's advantage is update cadence (weekly vs every 4 weeks) and chart position (#113 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Storc is free to download; Perfect OB Wheel costs $1.99 up front. Perfect OB Wheel sells 1 one-off in-app purchase and Storc sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Perfect OB Wheel ships an update weekly, Storc every 4 weeks. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard4 real differences · 7 level
Perfect OB Wheel versus Storc: the parameters behind the verdict, then further details
ParameterPerfect OB WheelStorc
Price$1.99Free — better
Rating4.9 (3.6K ratings) — better—
Positive reviews83.0% of reviews—
Number of ratings3.6K — better—
Update frequencyWeekly — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
Best chart rank#113 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size14 MB38 MB
Age rating17+4+
DeveloperEvan SchoenbergYuliyan Stefanov

Bugs and requests

Perfect OB Wheel

Reported bugs

3 issues
  • App crashes after update
  • Delivered today button not working after upgrade
  • Dates keep changing when entering info

Requested features

5 requests
  • Date-adjustment for women who have a five week menstrual cycle
  • More fields for infant info, apgars and weight
  • Ability to adjust cycle length
  • Ability to type in a gestation and get a date or type in a date and get a gestation
  • Calculate GA on a specific date

Storc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Perfect OB Wheel

One-time1
  • Perfect OB Tracker$4.99
2 purchases

Storc

Subscriptions2
  • Standard monthly7 Days trial$2.991 Month
  • Standard annually$29.991 Year

Questions

Is Perfect OB Wheel free?
Perfect OB Wheel costs $1.99, and also offers in-app purchases.
Is Storc free?
Storc is free to download, with in-app purchases available.
Do Perfect OB Wheel or Storc have ads?
Neither Perfect OB Wheel nor Storc shows ads.
Which is updated more often, Perfect OB Wheel or Storc?
Perfect OB Wheel ships an update weekly, and Storc every 4 weeks. Most recently, Perfect OB Wheel was updated on October 29, 2026 and Storc on October 27, 2026.

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