# D1 System vs Rupyz

The clearest difference is review sentiment: Rupyz at 92% against D1 System's 50%. Rupyz also leads on update cadence (every 3 weeks vs every 2 months). D1 System's advantage is iOS requirement (8.0 vs 16.6). 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, Rupyz every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | D1 System | Rupyz |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | **91.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 6 MB | 52 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [China Security & Fire IOT Sensing Co., Ltd.](https://appshunter.io/developer/914724038) | [Rupyz Fintech Private Limted](https://appshunter.io/developer/1606869486) |

## 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


### Rupyz

[App page](https://appshunter.io/ios/app/rupyz-b2b-business-app/id1606869184)

This app digitizes business operations and enables B2B e-commerce for brands, manufacturers, and traders. It offers real-time visibility and control over sales, inventory, and customer engagement, transforming traditional business processes.

**Highlights:** Digital business transformation, B2B E-commerce enablement, Real-time business visibility and control, Customizable product catalogs, Digital sales process management, Discover and connect with verified businesses, Free business and product promotion

**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 Rupyz free?

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

### Do D1 System or Rupyz have ads?

Neither D1 System nor Rupyz shows ads.

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

D1 System ships an update every 2 months, and Rupyz every 3 weeks. Most recently, D1 System was updated on November 1, 2026 and Rupyz on November 3, 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.*