# Master Scheduler vs MSK Sono

The clearest difference is in-app purchases: Master Scheduler at none against MSK Sono's 5. MSK Sono's advantage is update cadence (every 8 days vs monthly) and chart position (#45 vs unranked). On price, ads and device support there is nothing between them.

Both are free to download. MSK Sono sells 5 in-app purchases, starting at $29.99 per month. Master Scheduler asks for nothing beyond the download.

Master Scheduler ships an update monthly, MSK Sono every 8 days. Both last shipped on October 7, 2026.

## The numbers

| Metric | Master Scheduler | MSK Sono |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/msk-sono-ultrasound-guide/id6765696708/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | **#45** |
| Size | 22 MB | 95 MB |
| Requires iOS | 18.4 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Pacific Digital Ventures LLC](https://appshunter.io/developer/1845014246) | [The Bold Apps](https://appshunter.io/developer/1778750149) |

## What reviewers say

### Master Scheduler

[App page](https://appshunter.io/ios/app/master-scheduler/id6760582034)

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

**In-app purchases:** none


### MSK Sono

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

**Currently charting:** #45 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 (5)**

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


## Frequently asked questions

### Is Master Scheduler free?

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

### Is MSK Sono free?

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

### Do Master Scheduler or MSK Sono have ads?

Neither Master Scheduler nor MSK Sono shows ads.

### Which is updated more often, Master Scheduler or MSK Sono?

Master Scheduler ships an update monthly, and MSK Sono every 8 days. Most recently, Master Scheduler was updated on October 7, 2026 and MSK Sono on October 7, 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.*