# MSDマニュアル家庭版 vs COSA

The clearest difference is rating: MSDマニュアル家庭版 at 5.0 against COSA's 3.7. MSDマニュアル家庭版 also leads on ads (none vs shown) and monetization model (free vs ad-supported). COSA's advantage is update cadence (every 3 months vs every 6 months) and ratings volume (3 vs 1). On price, 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.

MSDマニュアル家庭版 holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

MSDマニュアル家庭版 ships an update every 6 months, COSA every 3 months. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | MSDマニュアル家庭版 | COSA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/msd/id1401474144/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/cosa-medication-information/id1626158440/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 82.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | **Free** | Ad-supported |
| Size | 200 MB | 28 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Merck Sharp & Dohme LLC](https://appshunter.io/developer/718617686) | [MEDICAL EDUCATION RESOURCES, LLC](https://appshunter.io/developer/1561046509) |

## What reviewers say

### MSDマニュアル家庭版

[App page](https://appshunter.io/ios/app/msd/id1401474144)

This medical encyclopedia provides clear, practical explanations of thousands of diseases, symptoms, diagnostic methods, and treatments. It features expert-written, regularly updated health information, including photos, illustrations, and videos to aid understanding. Interactive quizzes and medical news are also available.

**Highlights:** Expert-written medical information, Searchable by symptom, disease, or treatment, Photos and illustrations, Videos for visual understanding, Interactive health quizzes, Medical news updates

**Features:** macOS Compatibility

**In-app purchases:** none


### COSA

[App page](https://appshunter.io/ios/app/cosa-medication-information/id1626158440)

Access essential drug information and advanced patient resources. This app provides a portion of licensed drug data from a leading healthcare information provider, based on industry-standard databases.

**Highlights:** Essential drug information, Advanced patient resources, Licensed drug data, Industry-standard databases, Physician-focused resources

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MSDマニュアル家庭版 free?

MSDマニュアル家庭版 is free to download, with no in-app purchases.

### Is COSA free?

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

### Which has better reviews, MSDマニュアル家庭版 or COSA?

MSDマニュアル家庭版 is rated higher. MSDマニュアル家庭版 averages 5.0 out of 5 from 1 ratings, while COSA averages 3.7 from 3 ratings.

### Do MSDマニュアル家庭版 or COSA have ads?

COSA shows ads; MSDマニュアル家庭版 does not.

### Which is updated more often, MSDマニュアル家庭版 or COSA?

MSDマニュアル家庭版 ships an update every 6 months, and COSA every 3 months. Most recently, MSDマニュアル家庭版 was updated on September 21, 2026 and COSA on September 10, 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.*