# EQUINOX SOLAR vs MSD One

The clearest difference is update cadence: EQUINOX SOLAR at every 4 weeks against MSD One's every 6 months. EQUINOX SOLAR also leads on iOS requirement (13.0 vs 16.4). On price, ads, 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.

EQUINOX SOLAR ships an update every 4 weeks, MSD One every 6 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | EQUINOX SOLAR | MSD One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (7 ratings)](https://appshunter.io/ios/app/msd-one/id6474043630/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 6 months |
| Monetization | — | Free |
| Size | 58 MB | 122 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | +17 |
| Developer | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) | [Merck Sharp & Dohme LLC](https://appshunter.io/developer/718617686) |

## What reviewers say

### EQUINOX SOLAR

[App page](https://appshunter.io/ios/app/equinox-solar/id1523614627)

**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 EQUINOX SOLAR free?

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

### Is MSD One free?

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

### Do EQUINOX SOLAR or MSD One have ads?

Neither EQUINOX SOLAR nor MSD One shows ads.

### Which is updated more often, EQUINOX SOLAR or MSD One?

EQUINOX SOLAR ships an update every 4 weeks, and MSD One every 6 months. Most recently, EQUINOX SOLAR was updated on October 27, 2026 and MSD One 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.*