CMC Field Guide vs SDNM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CMC Field Guide
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.
- Rope rescue and access diagrams
- Reference charts
- How-to information
- Bookmark and take notes
- Offline access to downloads
- Browse equipment and tutorials
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This free App allows quick access to rope rescue and access diagrams, reference charts, how-to information, and rescue references, all from the palm of your hand while out in the field. It's packed with reference charts, diagrams, and how-to information. With the CMC Field Guide App you can: Access rescue references instantly Bookmark and take notes on your favorite sections Download videos, guides, and manuals for offline use Browse equipment and information, tutorials, and product user manuals **Note** Updating this App will give you access to all of the functionality built into the most recent version of the App. Your saved information including Notes, References, and Attachments, will be carried through into the updated version.
SDNM
This app allows users to anonymously and securely report near misses or close calls. It collects details about incidents, potential injuries, and safety improvements, with automatic blurring of faces and offensive images for privacy. The app offers full offline support and synchronizes data when a connection is available.
- Anonymous reporting
- Secure data collection
- Image upload and commenting
- Automatic image blurring (faces, offensive content)
- Offline support
- Auto-synchronization
- User feedback mechanism
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Anonymously and securely report near misses/close calls with the SDNM app. - Collect information about what happened - Collect information about potential injuries and/or damage to equipment - Collect information about potential improvements to safety - Upload and comment on images - App automatically blurs offensive and/or violent images - App automatically blurs all faces in uploaded images for anonymity - Submissions are anonymous by default - Full offline support and auto-synchronization of data and images when a connection is available - Integration with device email to submit questions about the app - User feedback mechanism to rate and comment on the app - New Near Miss submissions send an email to the Safety Operations team with all data, and secure links to scrubbed images
Screenshots
Verdict
The clearest difference is rating: SDNM at 4.5 against CMC Field Guide's 4.0. CMC Field Guide's advantage is ratings volume (24 vs 6). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SDNM holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 24 and 6 respectively.
CMC Field Guide ships an update every 3 months, SDNM every 4 months. The most recent releases landed on June 10, 2026 and September 14, 2026 respectively.
| Parameter | CMC Field Guide | SDNM |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (24 ratings) | 4.5 (6 ratings) — better |
| Positive reviews | 77.0% of reviews | — |
| Number of ratings | 24 — better | 6 |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 36 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | CMC Rescue, Inc. | San Diego Gas & Electric |
Customer experience
CMC Field Guide
SDNM
In-app purchases
CMC Field Guide
No in-app purchases
SDNM
No in-app purchases
