# Ajax Security System vs Simon iO

The clearest difference is review sentiment: Ajax Security System at 73% against Simon iO's 29%. Ajax Security System also leads on rating (4.3 vs 1.0) and ads (none vs shown). Simon iO's advantage is iOS requirement (14.0 vs 18.0). On price, in-app purchases and device support 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, 4.3 against 1.0. That said, the two scores are not equally well evidenced: Ajax Security System has 270 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 29% of Simon iO's.

Ajax Security System ships an update fortnightly, Simon iO every 3 months. The most recent releases landed on September 30, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Ajax Security System | Simon iO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (270 ratings)](https://appshunter.io/ios/app/ajax-security-system/id1063166247/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/simon-io/id1477805916/reviews) |
| Number of ratings | **270** | 1 |
| Positive reviews | **73.0% of reviews** | 28.6% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 727 MB | 91 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ajax Systems Inc](https://appshunter.io/developer/1063166246) | [Simon](https://appshunter.io/developer/531284305) |

## 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


### Simon iO

[App page](https://appshunter.io/ios/app/simon-io/id1477805916)

Control your smart home devices, including lights and blinds, from anywhere. Receive notifications, schedule routines, and customize device functionalities like lighting levels and power control. This app enhances your iO universe with a world of possibilities.

**Highlights:** Configure iO devices and experiences, Control lights and blinds, Receive notifications, Schedule routines, Adjust lighting levels, Power control for devices

**Features:** macOS Compatibility

**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 Simon iO free?

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

### Which has better reviews, Ajax Security System or Simon iO?

Ajax Security System is rated higher. Ajax Security System averages 4.3 out of 5 from 270 ratings, while Simon iO averages 1.0 from 1 ratings.

### Do Ajax Security System or Simon iO have ads?

Simon iO shows ads; Ajax Security System does not.

### Which is updated more often, Ajax Security System or Simon iO?

Ajax Security System ships an update fortnightly, and Simon iO every 3 months. Most recently, Ajax Security System was updated on September 30, 2026 and Simon iO on September 26, 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.*