# D1 System vs Weapons Detection System

The clearest difference is update cadence: Weapons Detection System at weekly against D1 System's every 2 months. D1 System's advantage is iOS requirement (8.0 vs 15.0). 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.

D1 System ships an update every 2 months, Weapons Detection System weekly. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | D1 System | Weapons Detection System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/weapons-detection-system/id1622681774/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | Free |
| Size | 6 MB | 148 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [China Security & Fire IOT Sensing Co., Ltd.](https://appshunter.io/developer/914724038) | [Athena Security](https://appshunter.io/developer/1494675502) |

## What reviewers say

### D1 System

[App page](https://appshunter.io/ios/app/d1-system/id914724035)

This app allows users to remotely manage an SMS alarm system. It enables sending text messages for home protection, configuring alarm host parameters, and setting zone and RFID card names. Users can also manage SMS codes.

**Highlights:** Send SMS for home protection, Configure alarm host parameters, Set zone names, Set RFID card names, Manage SMS codes

**Features:** macOS Compatibility

**In-app purchases:** none


### Weapons Detection System

[App page](https://appshunter.io/ios/app/weapons-detection-system/id1622681774)

This system provides remote notifications and accountability for walk-through metal detectors, helping organizations maintain security and compliance. It assists officers by acting as an extra layer of vigilance at entryways, ensuring adherence to best practices and preventing unauthorized items from entering facilities.

**Highlights:** Remote notifications, Accountability tracking, Incident response forms, Security officer check-in, Automated paperwork, Guest item reminders, Secondary screening AI

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is D1 System free?

D1 System is free to download, with no in-app purchases.

### Is Weapons Detection System free?

Weapons Detection System is free to download, with no in-app purchases.

### Do D1 System or Weapons Detection System have ads?

Neither D1 System nor Weapons Detection System shows ads.

### Which is updated more often, D1 System or Weapons Detection System?

D1 System ships an update every 2 months, and Weapons Detection System weekly. Most recently, D1 System was updated on October 1, 2026 and Weapons Detection System on October 5, 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.*