# 信昌机器 vs 51机械

The clearest difference is update cadence: 51机械 at monthly against 信昌机器's every 2 months. 信昌机器's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

信昌机器 ships an update every 2 months, 51机械 monthly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 信昌机器 | 51机械 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/51/id6498631490/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 47 MB | 49 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [森达美信昌机器工程(广东)有限公司](https://appshunter.io/developer/1291667416) | [HuiGong Technology (HangZhou) Co., Ltd.](https://appshunter.io/developer/1741716341) |

## What reviewers say

### 信昌机器

[App page](https://appshunter.io/ios/app/id1291667417)

**Features:** macOS Compatibility

**In-app purchases:** none


### 51机械

[App page](https://appshunter.io/ios/app/51/id6498631490)

This platform connects owners of construction machinery with job opportunities for rental and sale. It also facilitates recruitment for machine operators and provides tools for maintenance, repair, and project management. Users can access a marketplace for new and used equipment, streamlining operations and transactions within the industry.

**Highlights:** Find jobs and rentals for excavators, loaders, and cranes, Recruit certified and experienced machine operators, Access repair and maintenance services for machinery, Utilize project management and accounting tools, Buy and sell used construction equipment, Digital construction site management

**In-app purchases:** none


## Frequently asked questions

### Is 信昌机器 free?

信昌机器 is free to download, with no in-app purchases.

### Is 51机械 free?

51机械 is free to download, with no in-app purchases.

### Do 信昌机器 or 51机械 have ads?

Neither 信昌机器 nor 51机械 shows ads.

### Which is updated more often, 信昌机器 or 51机械?

信昌机器 ships an update every 2 months, and 51机械 monthly. Most recently, 信昌机器 was updated on October 26, 2026 and 51机械 on October 24, 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.*