# Ajax Security System vs CMC One

The clearest difference is review sentiment: Ajax Security System at 73% against CMC One's 14%. Ajax Security System also leads on rating (4.4 vs 1.0) and ratings volume (273 vs 1). CMC One's advantage is iOS requirement (15.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ajax Security System holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Ajax Security System has 273 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 73% of Ajax Security System's written reviews are positive against 14% of CMC One's.

Ajax Security System ships an update fortnightly, CMC One every 3 weeks. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Ajax Security System | CMC One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (273 ratings)](https://appshunter.io/ios/app/ajax-security-system/id1063166247/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/cmc-one/id6451318356/reviews) |
| Number of ratings | **273** | 1 |
| Positive reviews | **72.9% of reviews** | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 745 MB | 88 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | **iPhone, Apple TV, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ajax Systems Inc](https://appshunter.io/developer/1063166246) | [Joaquin Grosso](https://appshunter.io/developer/1661036639) |

## What reviewers say

### Ajax Security System

[App page](https://appshunter.io/ios/app/ajax-security-system/id1063166247)

Monitor your home or office security, receive instant alerts, and manage video surveillance and automation from a single interface. Arm/disarm your system, view visual alarm verification, and create custom automation scenarios for enhanced safety and convenience.

**Highlights:** Arm and disarm system remotely, Real-time event monitoring, Instant critical alerts, Visual alarm verification, Automation scenario creation, Mobile panic button, Manage multiple spaces

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Reliable system
- 👍 Easy to use app
- 🔒 Comprehensive security
- 💡 Convenient remote control
- 🚀 Stable and functional

**What reviewers complain about**

- 🐛 App freezes and crashes
- 👎 Constant updates
- 👎 Limited customization options
- 👎 Compatibility issues with iPad
- 👎 Buggy notifications

**Reported bugs**

- App freezing when accessing notifications
- Geofencing not working as expected
- Delayed response when arming/disarming
- Accidental panic button triggers
- Connectivity issues after WiFi changes

**Requested features**

- Ability to schedule night mode
- More sound options for door chimes
- Improved iPad app experience
- Siri/HomeKit integration
- Customizable alarm volume and notifications


### CMC One

[App page](https://appshunter.io/ios/app/cmc-one/id6451318356)

Control your alarm system's features and access a log of all recorded events. This app connects to monitoring servers to provide real-time system management.

**Highlights:** Alarm system functionality control, Access event history, Connect to monitoring servers, Real-time system management

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

**In-app purchases:** none


## Frequently asked questions

### Is Ajax Security System free?

Ajax Security System is free to download, with no in-app purchases.

### Is CMC One free?

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

### Which has better reviews, Ajax Security System or CMC One?

Ajax Security System is rated higher. Ajax Security System averages 4.4 out of 5 from 273 ratings, while CMC One averages 1.0 from 1 ratings.

### Do Ajax Security System or CMC One have ads?

Neither Ajax Security System nor CMC One shows ads.

### Which is updated more often, Ajax Security System or CMC One?

Ajax Security System ships an update fortnightly, and CMC One every 3 weeks. Most recently, Ajax Security System was updated on October 15, 2026 and CMC One on September 30, 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.*