# Merck Manual Consumer vs Relief Central

The clearest difference is monetization model: Merck Manual Consumer at free against Relief Central's free with in-app purchases. Merck Manual Consumer also leads on review sentiment (88% vs 66%) and iOS requirement (13.0 vs 15.0). Relief Central's advantage is ratings volume (924 vs 169). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for Merck Manual Consumer against 4.6 for Relief Central. That said, the two scores are not equally well evidenced: Relief Central has 924 ratings behind it against 169, so its average is the more settled of the two. Written reviews are what separate them: 88% of Merck Manual Consumer's written reviews are positive against 66% of Relief Central's.

Merck Manual Consumer ships an update every 4 months, Relief Central every 5 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | Merck Manual Consumer | Relief Central |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (169 ratings)](https://appshunter.io/ios/app/merck-manual-consumer/id331008341/reviews) | **[4.6 (924 ratings)](https://appshunter.io/ios/app/relief-central/id353219185/reviews)** |
| Number of ratings | 169 | **924** |
| Positive reviews | **87.9% of reviews** | 66.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 200 MB | 9 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Merck & Co Inc](https://appshunter.io/developer/334253467) | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) |

## What reviewers say

### Merck Manual Consumer

[App page](https://appshunter.io/ios/app/merck-manual-consumer/id331008341)

Access comprehensive medical information in everyday language. This app provides clear explanations of thousands of medical disorders, symptoms, diagnoses, and treatments, along with expert insights and multimedia resources.

**Highlights:** Expert-written health information, Everyday language explanations, Symptom, diagnosis, and treatment search, Photos and illustrations, Animations of diseases and treatments, Drug and medicine information

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Trustworthy knowledge source
- 👍 Excellent and handy resource
- 👍 Valuable information
- 👍 Easy to understand
- 👍 Authoritative and current

**What reviewers complain about**

- 🐛 App freezes when searching
- 🐛 App keeps crashing
- 🐛 Search crashes
- 🐛 Unable to load data
- 🐛 Search aborts

**Reported bugs**

- App freezes when searching for specific terms
- App crashes repeatedly, especially during searches
- App crashes when searching for 'Flea'
- App crashes after update
- Unable to load data

**Requested features**

- More intuitive search for related topics
- Improve search algorithms for easier topic finding
- Allow changing font size
- Fix download banner issue


### Relief Central

[App page](https://appshunter.io/ios/app/relief-central/id353219185)

Access critical disaster relief information, including country data, international travel health advisories, and field operations guides. Stay updated with the latest news from reputable organizations and find relevant research through journal citations.

**Highlights:** World Factbook data, CDC Yellow Book travel health, USAID Field Operations Guide, Disaster relief news feeds, Prime PubMed Search, Cross-linking and navigation, Note-taking and highlighting

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

**In-app purchases:** none

**What reviewers like**

- 👍 Excellent
- 💡 Helpful tool
- 👍 Best info
- 👍 Great app
- 👍 Exceptional

**What reviewers complain about**

- 🤔 Where did the COVID section go?
- 🤔 This app is too hard to use
- 🤔 In a nutshell, CRAP
- 🤔 Cheating app for vivid-19!
- 🤔 Français

**Reported bugs**

- The app crashes when trying to open ReliefWeb articles (or any links under it).

**Requested features**

- Please update. The app fails to include psychologists as a profession, but has mental health counselors and psychiatrists.


## Frequently asked questions

### Is Merck Manual Consumer free?

Merck Manual Consumer is free to download, with no in-app purchases.

### Is Relief Central free?

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

### Which has better reviews, Merck Manual Consumer or Relief Central?

Relief Central is rated higher. Merck Manual Consumer averages 4.6 out of 5 from 169 ratings, while Relief Central averages 4.6 from 924 ratings.

### Do Merck Manual Consumer or Relief Central have ads?

Neither Merck Manual Consumer nor Relief Central shows ads.

### Which is updated more often, Merck Manual Consumer or Relief Central?

Merck Manual Consumer ships an update every 4 months, and Relief Central every 5 months. Most recently, Merck Manual Consumer was updated on October 29, 2026 and Relief Central 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.*