# CMC Field Guide vs Pump Pressure

The clearest difference is price: CMC Field Guide at Free against Pump Pressure's $1.99. CMC Field Guide also leads on rating (4.0 vs 3.0) and ratings volume (24 vs 2). Pump Pressure's advantage is update cadence (every 5 days vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

CMC Field Guide is free to download; Pump Pressure costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CMC Field Guide holds the better App Store score, 4.0 against 3.0. That said, the two scores are not equally well evidenced: CMC Field Guide has 24 ratings behind it against 2, so its average is the more settled of the two.

CMC Field Guide ships an update every 3 months, Pump Pressure every 5 days. The most recent releases landed on October 16, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | CMC Field Guide | Pump Pressure |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.0 (24 ratings)](https://appshunter.io/ios/app/cmc-field-guide/id426955029/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/pump-pressure/id1558344403/reviews) |
| Number of ratings | **24** | 2 |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | **Free** | Paid |
| Size | 36 MB | 1 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CMC Rescue, Inc.](https://appshunter.io/developer/426955032) | [Daragh MacGabhann](https://appshunter.io/developer/1264239467) |

## 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


### Pump Pressure

[App page](https://appshunter.io/ios/app/pump-pressure/id1558344403)

This app calculates required pump discharge pressures for firefighting scenarios involving fog and smoothbore nozzles. It allows users to quickly adjust variables like flow rate, hose length, and diameter to see their impact on pressure.

**Highlights:** Fog nozzle calculations, Smoothbore nozzle calculations, Relay pumping calculations, Adjustable flow rate, hose length, and diameter, Real-time impact visualization

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

**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 Pump Pressure free?

Pump Pressure costs $1.99, with no in-app purchases.

### Which has better reviews, CMC Field Guide or Pump Pressure?

CMC Field Guide is rated higher. CMC Field Guide averages 4.0 out of 5 from 24 ratings, while Pump Pressure averages 3.0 from 2 ratings.

### Do CMC Field Guide or Pump Pressure have ads?

Neither CMC Field Guide nor Pump Pressure shows ads.

### Which is updated more often, CMC Field Guide or Pump Pressure?

CMC Field Guide ships an update every 3 months, and Pump Pressure every 5 days. Most recently, CMC Field Guide was updated on October 16, 2026 and Pump Pressure on October 3, 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.*