# Coexisting Diseases & Surgery vs Periop Pacemaker

The clearest difference is price: Periop Pacemaker at Free against Coexisting Diseases & Surgery's $99.99. Periop Pacemaker also leads on rating (5.0 vs 4.6) and review sentiment (100% vs 85%). Coexisting Diseases & Surgery's advantage is in-app purchases (none vs 2) and chart position (#88 vs unranked). On update cadence, ads, device support and iOS requirement there is nothing between them.

Periop Pacemaker is free to download; Coexisting Diseases & Surgery costs $99.99 up front. Periop Pacemaker sells 2 in-app purchases, starting at $2.99 per year. Coexisting Diseases & Surgery asks for nothing beyond the download.

Periop Pacemaker holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 29 and 8 respectively. Written reviews point the same way: 85% of Coexisting Diseases & Surgery's written reviews are positive against 100% of Periop Pacemaker's.

Coexisting Diseases & Surgery ships an update monthly, Periop Pacemaker every 2 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Coexisting Diseases & Surgery | Periop Pacemaker |
| --- | --- | --- |
| Price | $99.99 | **Free** |
| Rating | [4.6 (29 ratings)](https://appshunter.io/ios/app/coexisting-diseases-and-surgery/id1543711877/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/periop-pacemaker/id6615070538/reviews)** |
| Number of ratings | **29** | 8 |
| Positive reviews | 84.6% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#88** | — |
| Size | 212 MB | 43 MB |
| Requires iOS | 13 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Vargo Anesthesia Inc](https://appshunter.io/developer/441512939) | [Rhythm Management, LLC](https://appshunter.io/developer/1761518402) |

## What reviewers say

### Coexisting Diseases & Surgery

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

**Currently charting:** #88 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


### Periop Pacemaker

[App page](https://appshunter.io/ios/app/periop-pacemaker/id6615070538)

This app provides medical professionals with a decision algorithm for managing surgical patients with implantable defibrillators or pacemakers. It is based on guidelines endorsed by the Heart Rhythm Society and updated annually by an expert committee.

**Highlights:** Decision algorithm for pacemaker/defibrillator management, Endorsed by Heart Rhythm Society, Based on ASA Perioperative Cardiac Implantable Electronic Device Management Aid, Annual expert committee updates, Designed for medical professionals

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PERIOP PACEMAKER ANNUAL FEE | $2.99 | per year |
| Periop Pacemaker | $7.99 | one-time |


## Frequently asked questions

### Is Coexisting Diseases & Surgery free?

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

### Is Periop Pacemaker free?

Periop Pacemaker is free to download, with in-app purchases available.

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

Periop Pacemaker is rated higher. Coexisting Diseases & Surgery averages 4.6 out of 5 from 29 ratings, while Periop Pacemaker averages 5.0 from 8 ratings.

### Do Coexisting Diseases & Surgery or Periop Pacemaker have ads?

Neither Coexisting Diseases & Surgery nor Periop Pacemaker shows ads.

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

Coexisting Diseases & Surgery ships an update monthly, and Periop Pacemaker every 2 months. Most recently, Coexisting Diseases & Surgery was updated on October 27, 2026 and Periop Pacemaker 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.*