# CMC Field Guide vs GPS Format Converter

The clearest difference is price: CMC Field Guide at Free against GPS Format Converter's $0.99. CMC Field Guide also leads on ratings volume (24 vs 6) and iOS requirement (15.1 vs 18.6). GPS Format Converter's advantage is rating (4.5 vs 4.0). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

CMC Field Guide is free to download; GPS Format Converter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GPS Format Converter holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 24 and 6 respectively. Written reviews point the same way: 78% of CMC Field Guide's written reviews are positive against 81% of GPS Format Converter's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | CMC Field Guide | GPS Format Converter |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.0 (24 ratings)](https://appshunter.io/ios/app/cmc-field-guide/id426955029/reviews) | **[4.5 (6 ratings)](https://appshunter.io/ios/app/gps-format-converter/id1323303352/reviews)** |
| Number of ratings | **24** | 6 |
| Positive reviews | 77.8% of reviews | **81.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Paid |
| Size | 36 MB | 5 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CMC Rescue, Inc.](https://appshunter.io/developer/426955032) | [Bitwire Technologies Limited](https://appshunter.io/developer/1323303351) |

## 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


### GPS Format Converter

[App page](https://appshunter.io/ios/app/gps-format-converter/id1323303352)

Easily convert GPS coordinates between Degrees, Minutes, Seconds, Decimal Minutes, Decimal Degrees, and UTM formats. Share your current location or copy converted coordinates to the clipboard. Open locations directly in popular map applications.

**Highlights:** Convert between DMS, DMM, DD, and UTM, Get current location in all formats, Share location with one click, Copy coordinates to clipboard, Open coordinates in Apple Maps, Google Maps, or Waze

**Features:** 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 GPS Format Converter free?

GPS Format Converter costs $0.99, with no in-app purchases.

### Which has better reviews, CMC Field Guide or GPS Format Converter?

GPS Format Converter is rated higher. CMC Field Guide averages 4.0 out of 5 from 24 ratings, while GPS Format Converter averages 4.5 from 6 ratings.

### Do CMC Field Guide or GPS Format Converter have ads?

Neither CMC Field Guide nor GPS Format Converter shows ads.

### Which is updated more often, CMC Field Guide or GPS Format Converter?

CMC Field Guide ships an update every 3 months, and GPS Format Converter every 3 months. Most recently, CMC Field Guide was updated on October 16, 2026 and GPS Format Converter on October 13, 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.*