# Celus APP vs US MSK

The clearest difference is review sentiment: Celus APP at 90% against US MSK's 50%. Celus APP also leads on update cadence (every 2 weeks vs every 6 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Celus APP sells 2 in-app purchases, starting at $6.99 per month and US MSK sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Celus APP ships an update every 2 weeks, US MSK every 6 weeks. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Celus APP | US MSK |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **90.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 33 MB | 31 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Salus Sistemas Ltda](https://appshunter.io/developer/1531780011) | [Azul Systems](https://appshunter.io/developer/1460850225) |

## What reviewers say

### Celus APP

[App page](https://appshunter.io/ios/app/celus-app/id1591738281)

This medical app assists with diagnostic practices, particularly in ultrasound exams. It offers curated content, including brief articles, sample reports, risk calculators, and reference tables, to help users create accurate and personalized reports.

**Highlights:** Ultrasound diagnostic assistance, Personalizable content filtering, Curated articles and expert content, Sample diagnostic reports, Risk calculators for malignancy, Reference tables and calculations

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plano Mensal | $6.99 | per month |
| Plano Anual | $69.99 | per year |


### US MSK

[App page](https://appshunter.io/ios/app/us-msk/id1611606746)

This medical app serves as an atlas for musculoskeletal ultrasound imaging of the upper and lower limbs. It provides detailed visual guidance for diagnostic procedures. The app offers a free trial for its subscription plans.

**Highlights:** Musculoskeletal ultrasound atlas, Upper limb imaging, Lower limb imaging, Diagnostic guidance, Free trial available

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual | $9.99 | per year |


## Frequently asked questions

### Is Celus APP free?

Celus APP is free to download, with in-app purchases available.

### Is US MSK free?

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

### Do Celus APP or US MSK have ads?

Neither Celus APP nor US MSK shows ads.

### Which is updated more often, Celus APP or US MSK?

Celus APP ships an update every 2 weeks, and US MSK every 6 weeks. Most recently, Celus APP was updated on October 14, 2026 and US MSK on October 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*