# Periop Pacemaker vs Intra

The clearest difference is price: Periop Pacemaker at Free against Intra's $3.99. Periop Pacemaker also leads on iOS requirement (13.0 vs 18.4). Intra's advantage is in-app purchases (none vs 2) and chart position (#133 vs unranked). On rating, review sentiment, ratings volume and update cadence there is nothing between them.

Periop Pacemaker is free to download; Intra costs $3.99 up front. Periop Pacemaker sells 2 in-app purchases, starting at $2.99 per year. Intra 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 Intra. Both are backed by a comparable volume of ratings — 8 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Periop Pacemaker | Intra |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/periop-pacemaker/id6615070538/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/intra-op-fluid-calculator/id6748544694/reviews) |
| Number of ratings | **8** | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#133** |
| Size | 43 MB | 2 MB |
| Requires iOS | **13.0** | 18.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Rhythm Management, LLC](https://appshunter.io/developer/1761518402) | [Tyler Interrante](https://appshunter.io/developer/1821552598) |

## 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 |


### Intra

[App page](https://appshunter.io/ios/app/intra-op-fluid-calculator/id6748544694)

**Currently charting:** #133 Top Paid · Medical (US App Store)

This medical app assists anesthesia providers in quickly calculating intraoperative fluid requirements. It generates hour-by-hour fluid administration recommendations based on patient weight, NPO time, and surgery complexity, referencing established medical guidelines.

**Highlights:** Weight-based maintenance fluid calculation, Preoperative NPO deficit calculation, Intraoperative fluid loss adjustment, Hour-by-hour fluid administration table and chart, Consultation with practicing Anesthesiologists, References to medical guidelines

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Periop Pacemaker free?

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

### Is Intra free?

Intra costs $3.99, with no in-app purchases.

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

Periop Pacemaker and Intra are both rated 5.0 out of 5 on the App Store, from 8 and 3 ratings respectively.

### Do Periop Pacemaker or Intra have ads?

Neither Periop Pacemaker nor Intra shows ads.

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

Periop Pacemaker ships an update every 2 months, and Intra every 2 months. Most recently, Periop Pacemaker was updated on October 25, 2026 and Intra on October 30, 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.*