# Ajax Security System vs Serenity

The clearest difference is in-app purchases: Ajax Security System at none against Serenity's 1. Ajax Security System also leads on update cadence (fortnightly vs every 2 months). Serenity's advantage is iOS requirement (13.4 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Serenity sells 1 in-app purchase, starting at $3.99 per month. Ajax Security System asks for nothing beyond the download.

Ajax Security System ships an update fortnightly, Serenity every 2 months. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Ajax Security System | Serenity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (273 ratings)](https://appshunter.io/ios/app/ajax-security-system/id1063166247/reviews)** | — |
| Number of ratings | **273** | — |
| Positive reviews | 72.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | — |
| Size | 745 MB | 30 MB |
| Requires iOS | 18.0 | **13.4** |
| Devices | iPhone, Apple TV, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ajax Systems Inc](https://appshunter.io/developer/1063166246) | [De Software Ontwikkelaar](https://appshunter.io/developer/1471096492) |

## 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


### Serenity

[App page](https://appshunter.io/ios/app/serenity/id6478524479)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basis Lidmaatschap | $3.99 | per month |


## Frequently asked questions

### Is Ajax Security System free?

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

### Is Serenity free?

Serenity is free to download, with in-app purchases available.

### Do Ajax Security System or Serenity have ads?

Neither Ajax Security System nor Serenity shows ads.

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

Ajax Security System ships an update fortnightly, and Serenity every 2 months. Most recently, Ajax Security System was updated on October 15, 2026 and Serenity on October 10, 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.*