# iTIVA Anesthesia Plus vs Master Anesthesia

The clearest difference is update cadence: Master Anesthesia at every 6 days against iTIVA Anesthesia Plus's every 2 months. Master Anesthesia also leads on chart position (#189 vs unranked) and ratings volume (2K vs 330). iTIVA Anesthesia Plus's advantage is iOS requirement (11.0 vs 15.1). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. iTIVA Anesthesia Plus sells 2 in-app purchases, starting at $9.99 per year and Master Anesthesia sells 7 in-app purchases, starting at $69.99 per year. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for iTIVA Anesthesia Plus against 4.9 for Master Anesthesia. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 330, so its average is the more settled of the two. Written reviews are what separate them: 73% of iTIVA Anesthesia Plus's written reviews are positive against 79% of Master Anesthesia's.

iTIVA Anesthesia Plus ships an update every 2 months, Master Anesthesia every 6 days. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | iTIVA Anesthesia Plus | Master Anesthesia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (330 ratings)](https://appshunter.io/ios/app/itiva-anesthesia-plus/id1442975682/reviews) | **[4.9 (2K ratings)](https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews)** |
| Number of ratings | 330 | **2K** |
| Positive reviews | 72.7% of reviews | **79.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Subscription | Subscription |
| Best chart rank | — | **#189** |
| Size | 125 MB | 69 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [ANESTESIARTE CALI SAS](https://appshunter.io/developer/782878902) | [Matthew Willis](https://appshunter.io/developer/1550793080) |

## What reviewers say

### iTIVA Anesthesia Plus

[App page](https://appshunter.io/ios/app/itiva-anesthesia-plus/id1442975682)

This app simulates drug concentrations in plasma and optimizes infusion schemes for medical professionals. It offers a comprehensive drug library, target-controlled infusion simulation, and MAC age calculation. Users can explore drug interactions, share cases, and export data.

**Highlights:** Accurate drug concentration estimation, Target Controlled Infusion (TCI) simulation, Comprehensive drug library (28 drugs), Explore drug interactions (70 PK, 10 PD models), MAC Age Calculation, Intraoperative milestones & case sharing, Save and run multiple simulations, Excel data export

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iTIVA yearly | $9.99 | per year |
| iTIVA yearly 2021 | $9.99 | per year |


### Master Anesthesia

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

**Currently charting:** #189 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


## Frequently asked questions

### Is iTIVA Anesthesia Plus free?

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

### Is Master Anesthesia free?

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

### Which has better reviews, iTIVA Anesthesia Plus or Master Anesthesia?

Master Anesthesia is rated higher. iTIVA Anesthesia Plus averages 4.8 out of 5 from 330 ratings, while Master Anesthesia averages 4.9 from 2K ratings.

### Do iTIVA Anesthesia Plus or Master Anesthesia have ads?

Neither iTIVA Anesthesia Plus nor Master Anesthesia shows ads.

### Which is updated more often, iTIVA Anesthesia Plus or Master Anesthesia?

iTIVA Anesthesia Plus ships an update every 2 months, and Master Anesthesia every 6 days. Most recently, iTIVA Anesthesia Plus was updated on September 23, 2026 and Master Anesthesia on September 25, 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.*