# Online Anaesthesia vs Master Anesthesia

The clearest difference is review sentiment: Master Anesthesia at 78% against Online Anaesthesia's 33%. Master Anesthesia also leads on rating (4.9 vs 2.0) and update cadence (weekly vs every 3 months). Online Anaesthesia's advantage is in-app purchases (none vs 7) and iOS requirement (9.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Master Anesthesia sells 7 in-app purchases, starting at $69.99 per year. Online Anaesthesia asks for nothing beyond the download.

Master Anesthesia holds the better App Store score, 4.9 against 2.0. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of Online Anaesthesia's written reviews are positive against 78% of Master Anesthesia's.

Online Anaesthesia ships an update every 3 months, Master Anesthesia weekly. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Online Anaesthesia | Master Anesthesia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3 ratings)](https://appshunter.io/ios/app/online-anaesthesia/id399391367/reviews) | **[4.9 (2K ratings)](https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews)** |
| Number of ratings | 3 | **2K** |
| Positive reviews | 33.3% of reviews | **78.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | **Free** | Subscription |
| Best chart rank | — | **#97** |
| Size | 66 MB | 69 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Arjus Limited](https://appshunter.io/developer/399391370) | [Matthew Willis](https://appshunter.io/developer/1550793080) |

## What reviewers say

### Online Anaesthesia

[App page](https://appshunter.io/ios/app/online-anaesthesia/id399391367)

Log your medical cases from various specialties, including operations, intensive care, and pain management. This app offers an easy-to-use interface for instant case viewing, adding, and updating. Cases can be added offline and synced later, with daily backups and local backup options for your data.

**Highlights:** Log cases from operations, regional anaesthesia, obstetrics, ICU, and pain management, View, add, and update cases instantly, Offline case logging with automatic syncing, Daily database backups, Local backup option

**Features:** macOS Compatibility

**In-app purchases:** none


### Master Anesthesia

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

**Currently charting:** #97 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 Online Anaesthesia free?

Online Anaesthesia is free to download, with no in-app purchases.

### Is Master Anesthesia free?

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

### Which has better reviews, Online Anaesthesia or Master Anesthesia?

Master Anesthesia is rated higher. Online Anaesthesia averages 2.0 out of 5 from 3 ratings, while Master Anesthesia averages 4.9 from 2K ratings.

### Do Online Anaesthesia or Master Anesthesia have ads?

Neither Online Anaesthesia nor Master Anesthesia shows ads.

### Which is updated more often, Online Anaesthesia or Master Anesthesia?

Online Anaesthesia ships an update every 3 months, and Master Anesthesia weekly. Most recently, Online Anaesthesia was updated on October 6, 2026 and Master Anesthesia on October 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.*