# Master Anesthesia vs NYSORA IV Access

The clearest difference is monetization model: NYSORA IV Access at free with in-app purchases against Master Anesthesia's subscription. NYSORA IV Access also leads on review sentiment (100% vs 78%). Master Anesthesia's advantage is ratings volume (2K vs 2) and update cadence (weekly vs every 5 weeks). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Master Anesthesia sells 7 in-app purchases, starting at $69.99 per year and NYSORA IV Access sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Master Anesthesia against 5.0 for NYSORA IV Access. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 78% of Master Anesthesia's written reviews are positive against 100% of NYSORA IV Access's.

Master Anesthesia ships an update weekly, NYSORA IV Access every 5 weeks. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Master Anesthesia | NYSORA IV Access |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (2K ratings)](https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/nysora-iv-access/id6476096339/reviews)** |
| Number of ratings | **2K** | 2 |
| Positive reviews | 78.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Subscription | **Free with in-app purchases** |
| Best chart rank | **#146** | — |
| Size | 66 MB | 60 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Matthew Willis](https://appshunter.io/developer/1550793080) | [NYSORA inc.](https://appshunter.io/developer/1507388998) |

## What reviewers say

### Master Anesthesia

[App page](https://appshunter.io/ios/app/master-anesthesia/id1550793078)

**Currently charting:** #146 Top Grossing · Medical (US App Store)

This app provides anesthesia professionals with quick answers to common questions. It highlights anesthetic implications of diseases, surgical cases, and drugs, and includes a searchable acronym list and a comprehensive calculator for dosages, blood loss, and fluid management.

**Highlights:** Disease anesthetic implications, Surgical case anesthetic implications, Drug anesthetic implications, Searchable acronym list, Local anesthetic dosage calculator, Blood volume and loss calculator, Fluid and equipment calculations

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Master Anesthesia Contributor | $69.99 | per year |
| Full Access CE | $449.00 | per year |
| Module Unlock | $24.99 | one-time |
| Course Unlock | $99.00 | one-time |
| Master Anesthesia One Time | $99.99 | one-time |
| One-Time | $149.99 | one-time |
| Course Unlock | $449.00 | one-time |

**What reviewers like**

- 👍 Intuitive and user-friendly interface
- 🚀 Efficient and fast calculators
- 📚 Comprehensive information and resources
- 💡 Helpful for clinical practice and preparation
- 🔍 Useful reference for anesthesia providers

**What reviewers complain about**

- 🐛 Frequent crashes and freezes in the calculations section
- 🔒 Issues with purchase verification and login
- 💰 Concerns about the transition to a paid subscription model
- 🔋 High battery consumption and performance issues on older devices

**Reported bugs**

- Incorrect terminology and credentials on the starting screen
- Inconsistent behavior when accessing content after subscription changes

**Requested features**

- Offline access to content
- Apple Watch integration for the calculator
- More detailed and up-to-date information on procedures and conditions


### NYSORA IV Access

[App page](https://appshunter.io/ios/app/nysora-iv-access/id6476096339)

Master intravenous catheterization with interactive guides and high-quality videos. This app offers step-by-step techniques, troubleshooting tips, and specialized approaches for various patient populations. Enhance your skills for peripheral and ultrasound-guided IV access.

**Highlights:** Step-by-step IV access guides, High-quality clinical videos, Decision-making algorithms, Troubleshooting common challenges, Special population IV access techniques, Ultrasound-guided IV access tutorials

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FULL ACCESS SUBSCRIPTION | $4.99 | per month |
| FULL ACCESS SUBSCRIPTION | $39.99 | per year |


## Frequently asked questions

### Is Master Anesthesia free?

Master Anesthesia is free to download, with in-app purchases available.

### Is NYSORA IV Access free?

NYSORA IV Access is free to download, with in-app purchases available.

### Which has better reviews, Master Anesthesia or NYSORA IV Access?

NYSORA IV Access is rated higher. Master Anesthesia averages 4.9 out of 5 from 2K ratings, while NYSORA IV Access averages 5.0 from 2 ratings.

### Do Master Anesthesia or NYSORA IV Access have ads?

Neither Master Anesthesia nor NYSORA IV Access shows ads.

### Which is updated more often, Master Anesthesia or NYSORA IV Access?

Master Anesthesia ships an update weekly, and NYSORA IV Access every 5 weeks. Most recently, Master Anesthesia was updated on November 7, 2026 and NYSORA IV Access on November 8, 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.*