# SDNM vs Genasys Protect

The clearest difference is rating: SDNM at 4.5 against Genasys Protect's 2.7. SDNM also leads on device support (3 vs 1). Genasys Protect's advantage is update cadence (every 5 weeks vs every 4 months) and ratings volume (91 vs 6). 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.

SDNM holds the better App Store score, 4.5 against 2.7. That said, the two scores are not equally well evidenced: Genasys Protect has 91 ratings behind it against 6, so its average is the more settled of the two.

SDNM ships an update every 4 months, Genasys Protect every 5 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | SDNM | Genasys Protect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/sdnm/id1491809687/reviews)** | [2.7 (91 ratings)](https://appshunter.io/ios/app/genasys-protect/id1626884549/reviews) |
| Number of ratings | 6 | **91** |
| Positive reviews | — | 10.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 30 MB | 87 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [San Diego Gas & Electric](https://appshunter.io/developer/489246333) | [GENASYS](https://appshunter.io/developer/521628704) |

## What reviewers say

### SDNM

[App page](https://appshunter.io/ios/app/sdnm/id1491809687)

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.

**Highlights:** Anonymous reporting, Secure data collection, Image upload and commenting, Automatic image blurring (faces, offensive content), Offline support, Auto-synchronization, User feedback mechanism

**Features:** macOS Compatibility

**In-app purchases:** none


### Genasys Protect

[App page](https://appshunter.io/ios/app/genasys-protect/id1626884549)

Receive unified emergency alerts from multiple mass notification systems in one place. Get instant, geo-located notifications from local authorities and manage safety for multiple locations.

**Highlights:** Unified alerts from multiple systems, Instant geo-located notifications, Multi-location safety management, Real-time updates from authorities, Consolidated emergency communication

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

**In-app purchases:** none

**What reviewers like**

- 👍 Useful for Zonehaven system users
- 👍 Works well on iPhone (for some)
- 👍 Good idea for local info

**What reviewers complain about**

- 🐛 Unusable on iPad/certain iPhones
- 🐛 Inaccessible start button
- 🐛 Outdated information
- 🐛 Limited zone updates
- 🐛 Not user-friendly

**Reported bugs**

- Start button inaccessible on various devices
- App freezes during setup
- Does not update events promptly
- Information is outdated
- Limited zone updates cause missed alerts

**Requested features**

- Update app for all devices
- Update city-level warnings
- Improve UX/UI design
- Ensure real-time emergency propagation
- Allow notification access


## Frequently asked questions

### Is SDNM free?

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

### Is Genasys Protect free?

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

### Which has better reviews, SDNM or Genasys Protect?

SDNM is rated higher. SDNM averages 4.5 out of 5 from 6 ratings, while Genasys Protect averages 2.7 from 91 ratings.

### Do SDNM or Genasys Protect have ads?

Neither SDNM nor Genasys Protect shows ads.

### Which is updated more often, SDNM or Genasys Protect?

SDNM ships an update every 4 months, and Genasys Protect every 5 weeks. Most recently, SDNM was updated on November 3, 2026 and Genasys Protect on November 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.*