# D1 System vs 云投

The clearest difference is iOS requirement: D1 System at 8.0 against 云投's 13.0. 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.

D1 System ships an update every 2 months, 云投 every 5 weeks. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | D1 System | 云投 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 129 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [China Security & Fire IOT Sensing Co., Ltd.](https://appshunter.io/developer/914724038) | [中企云链股份有限公司](https://appshunter.io/developer/1097484432) |

## 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


### 云投

[App page](https://appshunter.io/ios/app/id1660958344)

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

**In-app purchases:** none


## Frequently asked questions

### Is D1 System free?

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

### Is 云投 free?

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

### Do D1 System or 云投 have ads?

Neither D1 System nor 云投 shows ads.

### Which is updated more often, D1 System or 云投?

D1 System ships an update every 2 months, and 云投 every 5 weeks. Most recently, D1 System was updated on October 17, 2026 and 云投 on October 11, 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.*