# iECG vs DW Sono

The clearest difference is update cadence: DW Sono at fortnightly against iECG's every 2 months. DW Sono also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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, DW Sono fortnightly. Both last shipped on October 30, 2026.

## The numbers

| Metric | iECG | DW Sono |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 2 MB | 367 MB |
| Requires iOS | 16.0 | **15.0** |
| 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) | [Dawei Medical (Jiangsu) Co.,Ltd](https://appshunter.io/developer/1675463297) |

## What reviewers say

### iECG

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

**Features:** macOS Compatibility

**In-app purchases:** none


### DW Sono

[App page](https://appshunter.io/ios/app/dw-sono/id6755143319)

**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 DW Sono free?

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

### Do iECG or DW Sono have ads?

Neither iECG nor DW Sono shows ads.

### Which is updated more often, iECG or DW Sono?

iECG ships an update every 2 months, and DW Sono fortnightly. Most recently, iECG was updated on October 30, 2026 and DW Sono on October 30, 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.*