# SafeLocal vs Master Anesthesia

The clearest difference is review sentiment: Master Anesthesia at 78% against SafeLocal's 30%. Master Anesthesia also leads on rating (4.9 vs 3.6) and update cadence (weekly vs every 6 months). SafeLocal's advantage is in-app purchases (none vs 7) and iOS requirement (13.5 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. SafeLocal asks for nothing beyond the download.

Master Anesthesia holds the better App Store score, 4.9 against 3.6. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 47, so its average is the more settled of the two. Written reviews point the same way: 30% of SafeLocal's written reviews are positive against 78% of Master Anesthesia's.

SafeLocal ships an update every 6 months, Master Anesthesia weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SafeLocal | Master Anesthesia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (47 ratings)](https://appshunter.io/ios/app/safelocal/id1440999841/reviews) | **[4.9 (2K ratings)](https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews)** |
| Number of ratings | 47 | **2K** |
| Positive reviews | 30.0% of reviews | **78.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | **Free** | Subscription |
| Best chart rank | — | **#111** |
| Size | 1 MB | 69 MB |
| Requires iOS | **13.5** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Johns Hopkins Mobile medicine](https://appshunter.io/developer/488749253) | [Matthew Willis](https://appshunter.io/developer/1550793080) |

## What reviewers say

### SafeLocal

[App page](https://appshunter.io/ios/app/safelocal/id1440999841)

This app simplifies safe local anesthetic dosage calculations for medical professionals. It accounts for patient weight, disease processes, anesthetic mixtures, and additives to determine maximum safe doses and track remaining amounts, eliminating manual calculations.

**Highlights:** Dosage calculator for local anesthetics, Adjusts dose by patient weight, Includes anesthesia with or without epinephrine, Accounts for comorbidities, Calculates remaining safe dose

**Features:** Vision Pro support

**In-app purchases:** none


### Master Anesthesia

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

**Currently charting:** #111 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 SafeLocal free?

SafeLocal 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, SafeLocal or Master Anesthesia?

Master Anesthesia is rated higher. SafeLocal averages 3.6 out of 5 from 47 ratings, while Master Anesthesia averages 4.9 from 2K ratings.

### Do SafeLocal or Master Anesthesia have ads?

Neither SafeLocal nor Master Anesthesia shows ads.

### Which is updated more often, SafeLocal or Master Anesthesia?

SafeLocal ships an update every 6 months, and Master Anesthesia weekly. Most recently, SafeLocal was updated on October 24, 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.*