# iECG vs CMS1600

The clearest difference is update cadence: iECG at every 2 months against CMS1600's every 9 months. CMS1600's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price, 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.

iECG ships an update every 2 months, CMS1600 every 9 months. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | iECG | CMS1600 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Size | 2 MB | 7 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [徐州永康电子科技有限公司](https://appshunter.io/developer/1095223244) | [Contec Medical Systems Co., Ltd.](https://appshunter.io/developer/908936493) |

## What reviewers say

### iECG

[App page](https://appshunter.io/ios/app/iecg/id6468363704)

**Features:** macOS Compatibility

**In-app purchases:** none


### CMS1600

[App page](https://appshunter.io/ios/app/cms1600-vet/id6474657919)

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

**In-app purchases:** none


## Frequently asked questions

### Is iECG free?

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

### Is CMS1600 free?

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

### Do iECG or CMS1600 have ads?

Neither iECG nor CMS1600 shows ads.

### Which is updated more often, iECG or CMS1600?

iECG ships an update every 2 months, and CMS1600 every 9 months. Most recently, iECG was updated on October 30, 2026 and CMS1600 on November 4, 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.*