# Periop Pacemaker vs LabRef

The clearest difference is in-app purchases: LabRef at none against Periop Pacemaker's 2. LabRef also leads on ratings volume (25 vs 8). Periop Pacemaker's advantage is iOS requirement (13.0 vs 26). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Periop Pacemaker sells 2 in-app purchases, starting at $2.99 per year. LabRef asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Periop Pacemaker against 5.0 for LabRef. Both are backed by a comparable volume of ratings — 8 and 25 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Periop Pacemaker ships an update every 2 months, LabRef every 5 weeks. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Periop Pacemaker | LabRef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/periop-pacemaker/id6615070538/reviews) | [5.0 (25 ratings)](https://appshunter.io/ios/app/labref/id6751020319/reviews) |
| Number of ratings | 8 | **25** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 43 MB | 16 MB |
| Requires iOS | **13.0** | 26 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Rhythm Management, LLC](https://appshunter.io/developer/1761518402) | [Rishi Kumar](https://appshunter.io/developer/1434016052) |

## What reviewers say

### 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 |


### LabRef

[App page](https://appshunter.io/ios/app/labref/id6751020319)

This medical reference app provides concise interpretations and reference ranges for common laboratory values across various disciplines. It's designed for quick access at the bedside, aiding in clinical decision-making. The app is for educational and informational purposes only.

**Highlights:** Interprets common laboratory values, Covers hematology, nephrology, critical care, and perioperative medicine, Provides concise interpretations, Includes reference ranges, Clean, intuitive interface, Optimized for bedside use

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

**In-app purchases:** none


## Frequently asked questions

### Is Periop Pacemaker free?

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

### Is LabRef free?

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

### Which has better reviews, Periop Pacemaker or LabRef?

Periop Pacemaker and LabRef are both rated 5.0 out of 5 on the App Store, from 8 and 25 ratings respectively.

### Do Periop Pacemaker or LabRef have ads?

Neither Periop Pacemaker nor LabRef shows ads.

### Which is updated more often, Periop Pacemaker or LabRef?

Periop Pacemaker ships an update every 2 months, and LabRef every 5 weeks. Most recently, Periop Pacemaker was updated on September 9, 2026 and LabRef on September 23, 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.*