# D1 System

> Remote SMS alarm system management for home protection and configuration. (iPhone/iPad app by China Security & Fire IOT Sensing Co., Ltd..)

- Source: https://appshunter.io/ios/app/d1-system/id914724035 (this page in markdown: same URL + `.md`)
- Developer: [China Security & Fire IOT Sensing Co., Ltd.](https://appshunter.io/developer/914724038)
- Category: Business
- Price: Free
- Age rating: 4+
- Requires: iOS 8.0 · 6 MB
- Languages: English, Chinese, Spanish
- Released: 2015-01-14
- Data updated: 2026-06-08
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/d1-system/id914724035/reviews.md

## What is D1 System?

D1 SMS alarm system
1: send text messages, deployed Chefang, home protection
2: set the alarm host parameters: hosting account, dial number
3: is set zone name
4: set RFID card name
5: SMS to code etc.

## Key features

- Send SMS for home protection
- Configure alarm host parameters
- Set zone names
- Set RFID card names
- Manage SMS codes

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/d1-system/id914724035/reviews.md

### 5/5 — Good developmet

*2021-09-18, version 2.8*

App very easy to use, easy communication by MSN 

Pleas keep this App in App Store.

Regards

### 3/5 — D1

*2019-01-22, version 2.8*

APP easy to access and to use, send in real time notification about alarm status

## Frequently asked questions about D1 System

### What is D1 System used for?

D1 System is used to remotely manage an SMS alarm system. It allows you to send text messages for home protection, configure alarm host parameters like account and dial numbers, and set names for zones and RFID cards.

### Is D1 System free to use?

Yes, D1 System is available for free. The provided data indicates it has no associated cost for download or use.

### Does D1 System have ads?

No, D1 System does not contain advertisements. The app's data specifies it is free and does not have ads.

### What devices is D1 System compatible with?

D1 System is compatible with iPhone and iPod devices. It is designed for iOS platforms.

### How often is D1 System updated?

The latest version of D1 System is 2.8, released on June 2, 2017. The app has not been updated since then.

### What is the age rating for D1 System?

D1 System has an age rating of 4+. This indicates it is suitable for users aged four and above.

### Can D1 System be used offline?

The app's functionality relies on sending and receiving SMS messages, which typically requires a cellular connection. Therefore, offline use is not supported for its core features.

## Version history (last 5 releases)

### 2.8 — 2017-06-02

This app has been updated by Apple to display the Apple Watch app icon.

support 19 bit;

### 2.7 — 2017-01-17

For iOS 10

### 2.6 — 2016-12-20

Do some improvement.

### 2.5 — 2016-06-27

fix some bugs

### 2.4 — 2016-05-28

Fix some bug

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## More apps by China Security & Fire IOT Sensing Co., Ltd.

- [Alarm 4 home +](https://appshunter.io/ios/app/alarm-4-home-plus/id1282204237)
- [iHorn Smart Life](https://appshunter.io/ios/app/ihorn-smart-life/id1487788692)
- [Secusystem](https://appshunter.io/ios/app/secusystem/id6447154033)

All apps by China Security & Fire IOT Sensing Co., Ltd.: https://appshunter.io/developer/914724038

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-08.*