# MSK Sono vs Protocol MD

The clearest difference is in-app purchases: Protocol MD at none against MSK Sono's 6. Protocol MD also leads on update cadence (every 2 days vs every 6 days). MSK Sono's advantage is chart position (#72 vs unranked). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. MSK Sono sells 6 in-app purchases, starting at $29.99 per month. Protocol MD asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for MSK Sono against 5.0 for Protocol MD. Both are backed by a comparable volume of ratings — 16 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

MSK Sono ships an update every 6 days, Protocol MD every 2 days. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | MSK Sono | Protocol MD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (16 ratings)](https://appshunter.io/ios/app/msk-sono-ultrasound-guide/id6765696708/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/protocol-md/id6824187308/reviews) |
| Number of ratings | **16** | 8 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 2 days** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#72** | — |
| Size | 99 MB | 3 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [The Bold Apps](https://appshunter.io/developer/1778750149) | [Protocol Studios LLC](https://appshunter.io/developer/6824187310) |

## What reviewers say

### MSK Sono

[App page](https://appshunter.io/ios/app/msk-sono-ultrasound-guide/id6765696708)

**Currently charting:** #72 Top Grossing · Medical (US App Store)

Master musculoskeletal ultrasound with this comprehensive reference app. It provides step-by-step guides, detailed anatomy, and procedural instructions for clinicians and learners. Improve scanning accuracy and confidence in daily practice.

**Highlights:** Step-by-step scanning guides, Detailed sonographic anatomy, Ultrasound-guided injection techniques, Nerve block guidance, High-resolution ultrasound images, Probe positioning and orientation, MSK pathology reference library

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $29.99 | per month |
| premium | $99.00 | per year |
| premium | $129.00 | per year |
| Yearly | $199.99 | per year |
| Yearly | $249.00 | per year |
| Yearly | $249.99 | per year |


### Protocol MD

[App page](https://appshunter.io/ios/app/protocol-md/id6824187308)

Connect with your care team, follow your physician's treatment plan, and track your orders. Receive medication reminders and manage your account securely. This app facilitates telehealth services for personalized treatment.

**Highlights:** Message care team, View physician's plan, Dose-day reminders, Track orders, Manage account, Secure sign-in

**In-app purchases:** none


## Frequently asked questions

### Is MSK Sono free?

MSK Sono is free to download, with in-app purchases available.

### Is Protocol MD free?

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

### Which has better reviews, MSK Sono or Protocol MD?

MSK Sono and Protocol MD are both rated 5.0 out of 5 on the App Store, from 16 and 8 ratings respectively.

### Do MSK Sono or Protocol MD have ads?

Neither MSK Sono nor Protocol MD shows ads.

### Which is updated more often, MSK Sono or Protocol MD?

MSK Sono ships an update every 6 days, and Protocol MD every 2 days. Most recently, MSK Sono was updated on November 9, 2026 and Protocol MD on November 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.*