# SIUI PIE vs CMS1600

The clearest difference is update cadence: CMS1600 at every 6 months against SIUI PIE's every 13 months. SIUI PIE's advantage is iOS requirement (9.0 vs 15.0). 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.

SIUI PIE ships an update every 13 months, CMS1600 every 6 months. The most recent releases landed on September 9, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | SIUI PIE | CMS1600 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/cms1600/id1620103169/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 6 months** |
| Monetization | — | Free |
| Size | 3 MB | 7 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Shantou Institute of Ultrasonic Inst. Co., Ltd.](https://appshunter.io/developer/406261738) | [Contec Medical Systems Co., Ltd.](https://appshunter.io/developer/908936493) |

## What reviewers say

### SIUI PIE

[App page](https://appshunter.io/ios/app/siui-pie-3/id434341652)

**Features:** macOS Compatibility

**In-app purchases:** none


### CMS1600

[App page](https://appshunter.io/ios/app/cms1600/id1620103169)

This advanced wireless ultrasound imaging system provides real-time, clear color ultrasound images across multiple work modes. It supports a wide range of examinations and includes powerful image processing and patient management features. Connect wirelessly for greater freedom of use.

**Highlights:** Multiple work modes (B, CDFI, M, PW), Supports various examinations (abdominal, OB/GYN, vascular, cardiac), Powerful image processing and optimization, Image and video annotation, saving, and DICOM storage, Patient management system, Wireless WiFi connectivity

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

**In-app purchases:** none


## Frequently asked questions

### Is SIUI PIE free?

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

### Is CMS1600 free?

CMS1600 is free to download, with no in-app purchases.

### Do SIUI PIE or CMS1600 have ads?

Neither SIUI PIE nor CMS1600 shows ads.

### Which is updated more often, SIUI PIE or CMS1600?

SIUI PIE ships an update every 13 months, and CMS1600 every 6 months. Most recently, SIUI PIE was updated on September 9, 2026 and CMS1600 on October 2, 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.*