# MSD One vs ACTHIV®

The clearest difference is ads: MSD One at none against ACTHIV®'s shown. MSD One also leads on monetization model (free vs ad-supported). ACTHIV®'s advantage is update cadence (every 3 weeks vs every 6 months). On price, rating, ratings volume and in-app purchases 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 — 4.4 for MSD One against 4.3 for ACTHIV®. Both are backed by a comparable volume of ratings — 7 and 9 respectively.

MSD One ships an update every 6 months, ACTHIV® every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | MSD One | ACTHIV® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/msd-one/id6474043630/reviews)** | [4.3 (9 ratings)](https://appshunter.io/ios/app/acthiv/id6497566682/reviews) |
| Number of ratings | 7 | **9** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 122 MB | 146 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | +17 | 17+ |
| Developer | [Merck Sharp & Dohme LLC](https://appshunter.io/developer/718617686) | [ACTHIV Institute](https://appshunter.io/developer/1352537541) |

## What reviewers say

### 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


### ACTHIV®

[App page](https://appshunter.io/ios/app/acthiv/id6497566682)

This app provides access to the latest developments and research findings in HIV care for frontline medical professionals. It offers both in-person and virtual attendance options for a premier US conference dedicated to HIV treatment. Attendees can engage with experts, network with peers, and access educational sessions online post-event.

**Highlights:** HIV care research updates, Clinical application of findings, In-person and virtual attendance, Expert faculty interaction, Networking opportunities, Online session access post-event

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is MSD One free?

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

### Is ACTHIV® free?

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

### Which has better reviews, MSD One or ACTHIV®?

MSD One is rated higher. MSD One averages 4.4 out of 5 from 7 ratings, while ACTHIV® averages 4.3 from 9 ratings.

### Do MSD One or ACTHIV® have ads?

ACTHIV® shows ads; MSD One does not.

### Which is updated more often, MSD One or ACTHIV®?

MSD One ships an update every 6 months, and ACTHIV® every 3 weeks. Most recently, MSD One was updated on October 24, 2026 and ACTHIV® 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.*