# Coexisting Diseases & Surgery vs VentRef

The clearest difference is price: VentRef at Free against Coexisting Diseases & Surgery's $99.99. VentRef also leads on rating (5.0 vs 4.6) and review sentiment (100% vs 85%). Coexisting Diseases & Surgery's advantage is chart position (#101 vs unranked) and iOS requirement (13 vs 26.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

VentRef is free to download; Coexisting Diseases & Surgery costs $99.99 up front. Neither carries in-app purchases, so what you see is what you pay.

VentRef holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 29 and 44 respectively. Written reviews point the same way: 85% of Coexisting Diseases & Surgery's written reviews are positive against 100% of VentRef's.

Coexisting Diseases & Surgery ships an update monthly, VentRef every 3 weeks. The most recent releases landed on October 25, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Coexisting Diseases & Surgery | VentRef |
| --- | --- | --- |
| Price | $99.99 | **Free** |
| Rating | [4.6 (29 ratings)](https://appshunter.io/ios/app/coexisting-diseases-and-surgery/id1543711877/reviews) | **[5.0 (44 ratings)](https://appshunter.io/ios/app/ventref/id6756503414/reviews)** |
| Number of ratings | 29 | **44** |
| Positive reviews | 84.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#101** | — |
| Size | 212 MB | 27 MB |
| Requires iOS | **13** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Vargo Anesthesia Inc](https://appshunter.io/developer/441512939) | [Rishi Kumar](https://appshunter.io/developer/1434016052) |

## What reviewers say

### Coexisting Diseases & Surgery

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

**Currently charting:** #101 Top Paid · 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


### VentRef

[App page](https://appshunter.io/ios/app/ventref/id6756503414)

A clinical reference tool for healthcare professionals managing mechanical ventilation and oxygen therapy. It provides information grounded in respiratory physiology and evidence-based critical care.

**Highlights:** Mechanical ventilation reference, Oxygen therapy reference, Respiratory physiology, Evidence-based critical care, Clinical decision support

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

**In-app purchases:** none


## Frequently asked questions

### Is Coexisting Diseases & Surgery free?

Coexisting Diseases & Surgery costs $99.99, with no in-app purchases.

### Is VentRef free?

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

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

VentRef is rated higher. Coexisting Diseases & Surgery averages 4.6 out of 5 from 29 ratings, while VentRef averages 5.0 from 44 ratings.

### Do Coexisting Diseases & Surgery or VentRef have ads?

Neither Coexisting Diseases & Surgery nor VentRef shows ads.

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

Coexisting Diseases & Surgery ships an update monthly, and VentRef every 3 weeks. Most recently, Coexisting Diseases & Surgery was updated on October 25, 2026 and VentRef on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*