# UpToDate vs OB Wheels

The clearest difference is rating: UpToDate at 3.6 against OB Wheels's 2.3. UpToDate also leads on update cadence (every 5 weeks vs every 18 months) and ratings volume (582 vs 15). OB Wheels's advantage is monetization model (free vs subscription) and iOS requirement (7.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

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

UpToDate holds the better App Store score, 3.6 against 2.3. That said, the two scores are not equally well evidenced: UpToDate has 582 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 28% of UpToDate's written reviews are positive against 20% of OB Wheels's.

UpToDate ships an update every 5 weeks, OB Wheels every 18 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | UpToDate | OB Wheels |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (582 ratings)](https://appshunter.io/ios/app/uptodate/id334265345/reviews)** | [2.3 (15 ratings)](https://appshunter.io/ios/app/ob-wheels/id969845527/reviews) |
| Number of ratings | **582** | 15 |
| Positive reviews | **28.2% of reviews** | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 18 months |
| Monetization | Subscription | **Free** |
| Size | 56 MB | 3 MB |
| Requires iOS | 18.0 | **7.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [UpToDate, Inc.](https://appshunter.io/developer/334265348) | [Joshua D. steinberg](https://appshunter.io/developer/374154837) |

## What reviewers say

### UpToDate

[App page](https://appshunter.io/ios/app/uptodate/id334265345)

This clinical decision support tool provides healthcare professionals with evidence-based guidance to improve patient care. It features AI-powered conversational answers, continuously updated medical content, and tools for drug reference, calculations, and patient education.

**Highlights:** Expert AI conversational guidance, Gold standard clinical content, Practice-changing updates, Patient education materials, Drug reference and interactions, Clinical calculators, Kidney dosing guidance

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💎 Invaluable medical resource
- 🚀 Quick and easy to use
- 🔍 Comprehensive and up-to-date content

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 🔌 Unreliable offline functionality
- 💰 Expensive subscription cost

**Reported bugs**

- Inability to download offline content
- Constant need to re-authenticate
- Incompatibility with recent iOS updates

**Requested features**

- Highlight and annotate content
- Improved institutional login support
- Dark mode and font size options


### 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


## Frequently asked questions

### Is UpToDate free?

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

### Is OB Wheels free?

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

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

UpToDate is rated higher. UpToDate averages 3.6 out of 5 from 582 ratings, while OB Wheels averages 2.3 from 15 ratings.

### Do UpToDate or OB Wheels have ads?

Neither UpToDate nor OB Wheels shows ads.

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

UpToDate ships an update every 5 weeks, and OB Wheels every 18 months. Most recently, UpToDate was updated on October 29, 2026 and OB Wheels on October 29, 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.*