# CMC Field Guide vs NH EMS

The clearest difference is rating: NH EMS at 5.0 against CMC Field Guide's 4.0. NH EMS also leads on update cadence (every 4 days vs every 3 months). CMC Field Guide's advantage is ratings volume (24 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NH EMS holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: CMC Field Guide has 24 ratings behind it against 3, so its average is the more settled of the two.

CMC Field Guide ships an update every 3 months, NH EMS every 4 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CMC Field Guide | NH EMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (24 ratings)](https://appshunter.io/ios/app/cmc-field-guide/id426955029/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/nh-ems/id6758019453/reviews)** |
| Number of ratings | **24** | 3 |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 36 MB | 178 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [CMC Rescue, Inc.](https://appshunter.io/developer/426955032) | [Drew Toma](https://appshunter.io/developer/6820180626) |

## What reviewers say

### CMC Field Guide

[App page](https://appshunter.io/ios/app/cmc-field-guide/id426955029)

Access rope rescue and access diagrams, reference charts, and how-to information instantly in the field. This free app provides essential rescue references, allows for note-taking, and supports offline access to downloaded content.

**Highlights:** Rope rescue and access diagrams, Reference charts, How-to information, Bookmark and take notes, Offline access to downloads, Browse equipment and tutorials

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Great resource for rescue
- 👍 Useful for knots
- 👍 Informative and well-organized
- 👍 Handy reference tool
- 👍 Clear illustrations

**What reviewers complain about**

- 🐛 App crashes frequently
- 🐛 Unable to access content after updates
- 🐛 Glitches and bugs
- 🐛 Poor display quality
- 🐛 Not working on iPad

**Reported bugs**

- App crashes before it opens
- Unable to go beyond the first page
- Unable to access after updating
- App crashed twice
- Some links in the app don't work

**Requested features**

- Enable landscape mode
- Update with latest techniques


### NH EMS

[App page](https://appshunter.io/ios/app/nh-ems/id6758019453)

This app provides New Hampshire Emergency Medical Services providers with offline access to critical patient care protocols and hospital information. It includes tools for quick hospital location, contact details for medical control, and EMS-specific calculators to aid in field decision-making.

**Highlights:** Offline patient care protocols, Nearby hospital locator, Medical control contact information, Hospital services list, EMS-specific calculators, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CMC Field Guide free?

CMC Field Guide is free to download, with no in-app purchases.

### Is NH EMS free?

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

### Which has better reviews, CMC Field Guide or NH EMS?

NH EMS is rated higher. CMC Field Guide averages 4.0 out of 5 from 24 ratings, while NH EMS averages 5.0 from 3 ratings.

### Do CMC Field Guide or NH EMS have ads?

Neither CMC Field Guide nor NH EMS shows ads.

### Which is updated more often, CMC Field Guide or NH EMS?

CMC Field Guide ships an update every 3 months, and NH EMS every 4 days. Most recently, CMC Field Guide was updated on November 6, 2026 and NH EMS on October 31, 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.*