SMS vs SDNM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SMS
This app allows aviation companies to create custom safety management forms and generate accurate reports. It supports dynamic form creation and offers free downloadable templates, with a FRAT included in the demo.
- Customizable form creation
- Accurate safety reporting
- Dynamic form building
- Free downloadable templates
- User and activation code management
- FRAT demo included
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This App was built to create an affordable SMS solution. App has a dynamic ability to create almost any form imaginable. You should be able to create any form your safety management system currently uses and if you can't send it to us to see if we can add more questions types. Reports are significantly more accurate than our old app. FRAT is included in the Demo Other templates are available to download for free This app is built for the aviation industry. Companies who sign up can add users and create activation codes for their employees.
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 monetization model: SDNM at free against SMS's free with in-app purchases. SMS's advantage is update cadence (monthly vs every 4 months) and iOS requirement (13.0 vs 15.6). On price, rating, ratings volume and ads 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.
SMS holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 3 and 6 respectively.
SMS ships an update monthly, SDNM every 4 months. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.
| Parameter | SMS | SDNM |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | 4.5 (6 ratings) |
| Number of ratings | 3 | 6 — better |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 23 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | NextGenSystems L.L.C | San Diego Gas & Electric |
Customer experience
SMS
SDNM
In-app purchases
SMS
No in-app purchases
SDNM
No in-app purchases
