# Mosby's Drug Reference vs Clinical Calculator PLUS

The clearest difference is ads: Mosby's Drug Reference at none against Clinical Calculator PLUS's shown. Mosby's Drug Reference also leads on rating (4.6 vs 4.3) and ratings volume (235 vs 7). Clinical Calculator PLUS's advantage is review sentiment (50% vs 32%) and iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Mosby's Drug Reference sells 1 in-app purchase, starting at $45.99 per year and Clinical Calculator PLUS sells 5 in-app purchases, starting at $1.49 per year. Whichever you choose, the download price is not the number that matters.

Mosby's Drug Reference holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Mosby's Drug Reference has 235 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 32% of Mosby's Drug Reference's written reviews are positive against 50% of Clinical Calculator PLUS's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 9 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Mosby's Drug Reference | Clinical Calculator PLUS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (235 ratings)](https://appshunter.io/ios/app/mosbys-drug-reference/id959042883/reviews)** | [4.3 (7 ratings)](https://appshunter.io/ios/app/clinical-calculator-plus/id1242209873/reviews) |
| Number of ratings | **235** | 7 |
| Positive reviews | 31.8% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | Every 9 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 45 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 17+ | 12+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### Mosby's Drug Reference

[App page](https://appshunter.io/ios/app/mosbys-drug-reference/id959042883)

This app provides healthcare professionals with comprehensive drug information, including actions, usage, dosage, interactions, and side effects. It emphasizes patient safety with Black Box Warnings, Safety Alerts, and information on life-threatening side effects. Features include custom notes, highlights, and quick search functionality.

**Highlights:** Over 5,000 drug listings, Black Box Warnings and Safety Alerts, Drug action, usage, dosage, interactions, side effects, Custom notes and highlights, Full text search, Appendix of recent FDA-approvals

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mosby's Drug Reference | $45.99 | per year |

**What reviewers like**

- 👍 Great reference for nursing students
- 👍 Reliable resource for medication information
- 👍 Invaluable for looking up drugs quickly
- 👍 Helpful for answering patient questions
- 👍 Easy and best to use mobile drug reference

**What reviewers complain about**

- 😞 Routinely does not have drugs
- 😞 Not for Canadian market
- 😞 Not categorized and searchable
- 😞 Cannot customize info display
- 😞 Most patients' meds weren't there

**Reported bugs**

- Every time I search norco or hydrocodone hydrochlorothiazide comes up

**Requested features**

- Version for people in the dental field
- Create an app version for dental drug reference
- Separate favorites list for users and spouses


### Clinical Calculator PLUS

[App page](https://appshunter.io/ios/app/clinical-calculator-plus/id1242209873)

Access over 350 medical calculators and scoring systems for healthcare professionals. This comprehensive tool simplifies complex formulas, providing quick and accurate results without an internet connection after initial download. It offers easy navigation and detailed information for each calculation.

**Highlights:** Over 350 medical calculators and scoring systems, Easy access to formulas via alphabetical, category, or historical lists, Built-in calculator for input processing, Detailed help information for each formula, Remembers last entered values, Offline access to content, SmartSearch for medical terms

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25% Off - Limited Time Offer | $1.49 | per year |
| 20% Off - Limited Time Offer | $1.59 | per year |
| 15% Off - Limited Time Offer | $1.69 | per year |
| ClinicalCalculator PLUS 1Y Sub | $4.99 | per year |
| Clinical Calculator PLUS™ | $4.99 | one-time |


## Frequently asked questions

### Is Mosby's Drug Reference free?

Mosby's Drug Reference is free to download, with in-app purchases available.

### Is Clinical Calculator PLUS free?

Clinical Calculator PLUS is free to download, with in-app purchases available.

### Which has better reviews, Mosby's Drug Reference or Clinical Calculator PLUS?

Mosby's Drug Reference is rated higher. Mosby's Drug Reference averages 4.6 out of 5 from 235 ratings, while Clinical Calculator PLUS averages 4.3 from 7 ratings.

### Do Mosby's Drug Reference or Clinical Calculator PLUS have ads?

Clinical Calculator PLUS shows ads; Mosby's Drug Reference does not.

### Which is updated more often, Mosby's Drug Reference or Clinical Calculator PLUS?

Mosby's Drug Reference ships an update every 9 months, and Clinical Calculator PLUS every 9 months. Most recently, Mosby's Drug Reference was updated on October 29, 2026 and Clinical Calculator PLUS on October 24, 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.*