# OB Wheels vs WHO Contraception tool

The clearest difference is rating: WHO Contraception tool at 4.0 against OB Wheels's 2.3. OB Wheels's advantage is review sentiment (20% vs 0%) and ratings volume (15 vs 4). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

WHO Contraception tool holds the better App Store score, 4.0 against 2.3. Both are backed by a comparable volume of ratings — 15 and 4 respectively. Written reviews complicate that: 20% of OB Wheels's written reviews are positive against 0% of WHO Contraception tool's, so the app with the better star average is not the one people write more warmly about.

OB Wheels ships an update every 18 months, WHO Contraception tool every 15 months. The most recent releases landed on November 11, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | OB Wheels | WHO Contraception tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (15 ratings)](https://appshunter.io/ios/app/ob-wheels/id969845527/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/who-contraception-tool/id1439446129/reviews)** |
| Number of ratings | **15** | 4 |
| Positive reviews | **20.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 15 months** |
| Monetization | Free | Free |
| Size | 3 MB | 14 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Joshua D. steinberg](https://appshunter.io/developer/374154837) | [RC DIGITAL LTD OOD](https://appshunter.io/developer/1769416283) |

## 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


### WHO Contraception tool

[App page](https://appshunter.io/ios/app/who-contraception-tool/id1439446129)

This digital tool provides medical eligibility criteria for initiating various contraceptive methods. It guides healthcare providers in recommending safe and effective family planning options for women with specific medical conditions or characteristics.

**Highlights:** Digital MEC Wheel, Contraceptive method eligibility, Guidance for family planning providers, Recommendations for women with medical conditions, Covers nine common contraceptive methods

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

**In-app purchases:** none


## Frequently asked questions

### Is OB Wheels free?

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

### Is WHO Contraception tool free?

WHO Contraception tool is free to download, with no in-app purchases.

### Which has better reviews, OB Wheels or WHO Contraception tool?

WHO Contraception tool is rated higher. OB Wheels averages 2.3 out of 5 from 15 ratings, while WHO Contraception tool averages 4.0 from 4 ratings.

### Do OB Wheels or WHO Contraception tool have ads?

Neither OB Wheels nor WHO Contraception tool shows ads.

### Which is updated more often, OB Wheels or WHO Contraception tool?

OB Wheels ships an update every 18 months, and WHO Contraception tool every 15 months. Most recently, OB Wheels was updated on November 11, 2026 and WHO Contraception tool on November 2, 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.*