# OB Wheels vs OB Wheel

The clearest difference is rating: OB Wheel at 4.3 against OB Wheels's 2.3. OB Wheel also leads on update cadence (every 4 days vs every 18 months). OB Wheels's advantage is in-app purchases (none vs 2) and iOS requirement (7.0 vs 14.0). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. OB Wheel sells 2 one-off in-app purchases. OB Wheels asks for nothing beyond the download.

OB Wheel holds the better App Store score, 4.3 against 2.3. Both are backed by a comparable volume of ratings — 15 and 10 respectively.

OB Wheels ships an update every 18 months, OB Wheel every 4 days. The most recent releases landed on October 26, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | OB Wheels | OB Wheel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (15 ratings)](https://appshunter.io/ios/app/ob-wheels/id969845527/reviews) | **[4.3 (10 ratings)](https://appshunter.io/ios/app/ob-wheel/id6473123188/reviews)** |
| Number of ratings | **15** | 10 |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 3 MB | 28 MB |
| Requires iOS | **7.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Joshua D. steinberg](https://appshunter.io/developer/374154837) | [Berkay Gurcesme](https://appshunter.io/developer/1618081315) |

## What reviewers say

### OB Wheels

[App page](https://appshunter.io/ios/app/ob-wheels/id969845527)

This app calculates due dates, gestational age, and reconciles sonogram and LMP dates using a digital OB wheel and calendar. It offers a familiar interactive wheel for precise date calculations, accounting for leap years.

**Highlights:** Calendar calculator for EDD/EDC, Gestational age calculation, Interactive digital OB wheel, Reconciliation of due dates, Leap year accuracy

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OB Wheel

[App page](https://appshunter.io/ios/app/ob-wheel/id6473123188)

This app assists expectant mothers and healthcare professionals in tracking pregnancy with accurate due date calculations and weekly fetal development updates. It offers customizable features, health tips, and tools for clinicians to support patient care throughout the journey to delivery.

**Highlights:** Accurate due date calculation, Weekly fetal development tracker, Customizable reminders and tracking, Health tips and resources, Tools for healthcare professionals, Symptom and feeling logging

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ob Wheel lifetime ad-free | $3.99 | one-time |
| Unlimited Ad-free Ob wheel | $9.99 | one-time |


## Frequently asked questions

### Is OB Wheels free?

OB Wheels is free to download, with no in-app purchases.

### Is OB Wheel free?

OB Wheel is free to download, with in-app purchases available.

### Which has better reviews, OB Wheels or OB Wheel?

OB Wheel is rated higher. OB Wheels averages 2.3 out of 5 from 15 ratings, while OB Wheel averages 4.3 from 10 ratings.

### Do OB Wheels or OB Wheel have ads?

Neither OB Wheels nor OB Wheel shows ads.

### Which is updated more often, OB Wheels or OB Wheel?

OB Wheels ships an update every 18 months, and OB Wheel every 4 days. Most recently, OB Wheels was updated on October 26, 2026 and OB Wheel on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*