# CHEST vs MSD One

The clearest difference is rating: MSD One at 4.4 against CHEST's 4.2. MSD One also leads on monetization model (free vs ad-supported). On price, review sentiment, ratings volume and update cadence there is nothing between them.

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

MSD One holds the better App Store score, 4.4 against 4.2. Both are backed by a comparable volume of ratings — 15 and 7 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

CHEST ships an update every 10 months, MSD One every 6 months. The most recent releases landed on October 24, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | CHEST | MSD One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (15 ratings)](https://appshunter.io/ios/app/chest-events/id6463945999/reviews) | **[4.4 (7 ratings)](https://appshunter.io/ios/app/msd-one/id6474043630/reviews)** |
| Number of ratings | **15** | 7 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 months** |
| Monetization | Ad-supported | **Free** |
| Size | 53 MB | 122 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | +17 |
| Developer | [American College of Chest Physicians](https://appshunter.io/developer/541113525) | [Merck Sharp & Dohme LLC](https://appshunter.io/developer/718617686) |

## What reviewers say

### CHEST

[App page](https://appshunter.io/ios/app/chest-events/id6463945999)

This app helps attendees plan their experience at the CHEST Annual Meeting. Browse the educational program, build a personal schedule, and access convention center maps. Find details on special events, exhibitors, and important announcements.

**Highlights:** Browse educational program, Build personal schedule, Bookmark sessions/speakers, Convention center maps, Exhibitor listings, Special event details, Receive announcements

**Features:** Vision Pro support

**In-app purchases:** none


### MSD One

[App page](https://appshunter.io/ios/app/msd-one/id6474043630)

Enhance hybrid and in-person events with interactive features. Attendees receive personalized agendas, travel updates, and venue info. Facilitate audience engagement through Q&A, polls, and a secure social media wall.

**Highlights:** Personalized agendas, Real-time travel updates, Moderated Q&A panel, Slide saving with annotations, Audience polling and gamification, Private social media wall

**In-app purchases:** none


## Frequently asked questions

### Is CHEST free?

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

### Is MSD One free?

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

### Which has better reviews, CHEST or MSD One?

MSD One is rated higher. CHEST averages 4.2 out of 5 from 15 ratings, while MSD One averages 4.4 from 7 ratings.

### Do CHEST or MSD One have ads?

Neither CHEST nor MSD One shows ads.

### Which is updated more often, CHEST or MSD One?

CHEST ships an update every 10 months, and MSD One every 6 months. Most recently, CHEST was updated on October 24, 2026 and MSD One on November 2, 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.*