Perfect OB Wheel vs Storc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Storc
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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
Verdict
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
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.
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.
| Parameter | Perfect OB Wheel | Storc |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.9 (3.6K ratings) — better | — |
| Positive reviews | 83.0% of reviews | — |
| Number of ratings | 3.6K — better | — |
| Update frequency | Weekly — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #113 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 14 MB | 38 MB |
| Age rating | 17+ | 4+ |
| Developer | Evan Schoenberg | Yuliyan 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
Perfect OB Wheel
- Perfect OB Tracker$4.99
Storc
- Standard monthly7 Days trial$2.991 Month
- Standard annually$29.991 Year
Questions
Is Perfect OB Wheel free?
Is Storc free?
Do Perfect OB Wheel or Storc have ads?
Which is updated more often, Perfect OB Wheel or Storc?
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