# Anesthesia Central vs Coexisting Diseases & Surgery

The clearest difference is price: Anesthesia Central at Free against Coexisting Diseases & Surgery's $79.99. Anesthesia Central also leads on ratings volume (105 vs 29). Coexisting Diseases & Surgery's advantage is in-app purchases (none vs 2) and update cadence (monthly vs every 9 months). On rating, ads and device support there is nothing between them.

Anesthesia Central is free to download; Coexisting Diseases & Surgery costs $79.99 up front. Anesthesia Central sells 2 in-app purchases, starting at $99.99 per year. Coexisting Diseases & Surgery asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Anesthesia Central against 4.6 for Coexisting Diseases & Surgery. Both are backed by a comparable volume of ratings — 105 and 29 respectively. Written reviews are what separate them: 74% of Anesthesia Central's written reviews are positive against 85% of Coexisting Diseases & Surgery's.

Anesthesia Central ships an update every 9 months, Coexisting Diseases & Surgery monthly. The most recent releases landed on November 8, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Anesthesia Central | Coexisting Diseases & Surgery |
| --- | --- | --- |
| Price | **Free** | $79.99 |
| Rating | **[4.6 (105 ratings)](https://appshunter.io/ios/app/anesthesia-central/id347656772/reviews)** | [4.6 (29 ratings)](https://appshunter.io/ios/app/coexisting-diseases-and-surgery/id1543711877/reviews) |
| Number of ratings | **105** | 29 |
| Positive reviews | 74.4% of reviews | **84.6% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | #189 | **#14** |
| Size | 9 MB | 212 MB |
| Requires iOS | 15.0 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Vargo Anesthesia Inc](https://appshunter.io/developer/441512939) |

## What reviewers say

### Anesthesia Central

[App page](https://appshunter.io/ios/app/anesthesia-central/id347656772)

**Currently charting:** #189 Top Grossing · Medical (US App Store)

This app provides anesthesiologists and critical care specialists with essential information for patient care before, during, and after surgery. It includes disease, drug, test, and procedure details, along with access to the PubMed database for journal articles.

**Highlights:** Disease, drug, test, and procedure information, Access to PubMed database, MGH Clinical Anesthesia Procedures, Davis's Drug Guide, Pocket ICU Management, Pocket Guide to Diagnostic Tests, Integrated calculators

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Anesthesia Central Renewal | $99.99 | per year |
| Anesthesia Central | $169.99 | one-time |

**What reviewers like**

- 👍 Excellent anesthesia resource
- 👍 Great for clinicals
- 👍 Well-written and organized
- 👍 Concise and practical
- 👍 Quick reference for students

**What reviewers complain about**

- 💰 Expensive, high price tag
- 💰 Requires annual renewal/subscription
- 💰 Not a one-time purchase
- 💰 Overpriced for content
- 💰 Updates are costly

**Reported bugs**

- App no longer works after changing devices
- Requires re-purchase after device change
- Not working after iOS update
- Often updates when opened, limiting usefulness
- Does not function

**Requested features**

- Allow notes to be added
- Add pictures for procedures
- More comprehensive procedures list
- Improve interface, similar to Epocrates
- Allow Medline to search topics


### Coexisting Diseases & Surgery

[App page](https://appshunter.io/ios/app/coexisting-diseases-and-surgery/id1543711877)

**Currently charting:** #14 Top Paid · Medical, #78 Top Grossing · Medical (US App Store)

This medical reference app provides detailed information on common and rare diseases, including their description, etiology, diagnosis, treatment, and prognosis. It also offers guidance on managing surgical patients with coexisting conditions.

**Highlights:** Disease descriptions, Etiology and onset, Diagnosis and pathophysiology, Treatment and prognosis, Perioperative management, Disease-related surgical concerns

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

**In-app purchases:** none


## Frequently asked questions

### Is Anesthesia Central free?

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

### Is Coexisting Diseases & Surgery free?

Coexisting Diseases & Surgery costs $79.99, with no in-app purchases.

### Which has better reviews, Anesthesia Central or Coexisting Diseases & Surgery?

Anesthesia Central is rated higher. Anesthesia Central averages 4.6 out of 5 from 105 ratings, while Coexisting Diseases & Surgery averages 4.6 from 29 ratings.

### Do Anesthesia Central or Coexisting Diseases & Surgery have ads?

Neither Anesthesia Central nor Coexisting Diseases & Surgery shows ads.

### Which is updated more often, Anesthesia Central or Coexisting Diseases & Surgery?

Anesthesia Central ships an update every 9 months, and Coexisting Diseases & Surgery monthly. Most recently, Anesthesia Central was updated on November 8, 2026 and Coexisting Diseases & Surgery on November 7, 2026.

### Which is more popular, Anesthesia Central or Coexisting Diseases & Surgery?

Anesthesia Central currently peaks at #189 in the App Store charts, and Coexisting Diseases & Surgery at #14. Chart position reflects recent download velocity rather than total install base.

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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.*