# Mosby's Drug Reference vs Memory Rx

The clearest difference is rating: Mosby's Drug Reference at 4.6 against Memory Rx's 1.0. Mosby's Drug Reference also leads on ratings volume (235 vs 1) and chart position (#193 vs unranked). Memory Rx's advantage is update cadence (every 5 weeks vs every 9 months). On price, ads, 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 Memory Rx sells 2 in-app purchases, starting at $3.99 per month. 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 1.0. That said, the two scores are not equally well evidenced: Mosby's Drug Reference has 235 ratings behind it against 1, so its average is the more settled of the two.

Mosby's Drug Reference ships an update every 9 months, Memory Rx every 5 weeks. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Mosby's Drug Reference | Memory Rx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (235 ratings)](https://appshunter.io/ios/app/mosbys-drug-reference/id959042883/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/memory-rx/id1627070152/reviews) |
| Number of ratings | **235** | 1 |
| Positive reviews | 31.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | **#193** | — |
| Size | 9 MB | 18 MB |
| Requires iOS | **15.0** | 15.4 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Nishith Sekhar Revappala](https://appshunter.io/developer/1466617406) |

## What reviewers say

### Mosby's Drug Reference

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

**Currently charting:** #193 Top Grossing · Medical (US App Store)

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 |


### Memory Rx

[App page](https://appshunter.io/ios/app/memory-rx/id1627070152)

This app helps users remember pharmacology mnemonics through interactive quizzes. It combines memorization techniques with multiple-choice questions to reinforce learning, making a challenging subject more manageable.

**Highlights:** Pharmacology mnemonics, MCQ-based quizzes, Favouriting mnemonics, Access to all mnemonics, Access to all MCQs, Pro subscription features

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro access | $3.99 | per month |
| Pro access | $19.99 | per year |


## Frequently asked questions

### Is Mosby's Drug Reference free?

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

### Is Memory Rx free?

Memory Rx is free to download, with in-app purchases available.

### Which has better reviews, Mosby's Drug Reference or Memory Rx?

Mosby's Drug Reference is rated higher. Mosby's Drug Reference averages 4.6 out of 5 from 235 ratings, while Memory Rx averages 1.0 from 1 ratings.

### Do Mosby's Drug Reference or Memory Rx have ads?

Neither Mosby's Drug Reference nor Memory Rx shows ads.

### Which is updated more often, Mosby's Drug Reference or Memory Rx?

Mosby's Drug Reference ships an update every 9 months, and Memory Rx every 5 weeks. Most recently, Mosby's Drug Reference was updated on October 11, 2026 and Memory Rx on October 7, 2026.

---

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