# CMC Field Guide vs PumpOps

The clearest difference is rating: PumpOps at 5.0 against CMC Field Guide's 4.0. PumpOps also leads on update cadence (every 10 days vs every 3 months). CMC Field Guide's advantage is ratings volume (24 vs 1). 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.

PumpOps 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 1, so its average is the more settled of the two.

CMC Field Guide ships an update every 3 months, PumpOps every 10 days. The most recent releases landed on October 6, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | CMC Field Guide | PumpOps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (24 ratings)](https://appshunter.io/ios/app/cmc-field-guide/id426955029/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pumpops/id6798931183/reviews)** |
| Number of ratings | **24** | 1 |
| Positive reviews | 77.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 36 MB | 9 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [CMC Rescue, Inc.](https://appshunter.io/developer/426955032) | [TREVOR GREENWOOD WILLIAMS](https://appshunter.io/developer/6798931185) |

## 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


### PumpOps

[App page](https://appshunter.io/ios/app/pumpops/id6798931183)

This app quickly calculates engine pressure for fire apparatus engineers and operator candidates. It allows users to select nozzles, hoses, and layouts to instantly update pump discharge pressure, with a clear breakdown of the equation used. It also includes reference and training tools for various fireground hydraulics.

**Highlights:** Instant PSI calculation, Live equation breakdown, Friction loss per 100', Supports various nozzles and hose lays, Appliance and elevation calculations, Interactive formula calculators, Customizable themes and presets

**Features:** macOS Compatibility, Apple Watch app, 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 PumpOps free?

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

### Which has better reviews, CMC Field Guide or PumpOps?

PumpOps is rated higher. CMC Field Guide averages 4.0 out of 5 from 24 ratings, while PumpOps averages 5.0 from 1 ratings.

### Do CMC Field Guide or PumpOps have ads?

Neither CMC Field Guide nor PumpOps shows ads.

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

CMC Field Guide ships an update every 3 months, and PumpOps every 10 days. Most recently, CMC Field Guide was updated on October 6, 2026 and PumpOps 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.*