# Dynamic Volumetric Method vs iECG

The clearest difference is price: iECG at Free against Dynamic Volumetric Method's $19.99. iECG also leads on update cadence (every 2 months vs every 38 months). Dynamic Volumetric Method's advantage is device support (3 vs 1) and iOS requirement (10.2 vs 16.0). On ads and in-app purchases there is nothing between them.

iECG is free to download; Dynamic Volumetric Method costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Dynamic Volumetric Method ships an update every 38 months, iECG every 2 months. The most recent releases landed on September 18, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Dynamic Volumetric Method | iECG |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 2 months** |
| Size | 17 MB | 2 MB |
| Requires iOS | **10.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [徐州永康电子科技有限公司](https://appshunter.io/developer/1095223244) |

## What reviewers say

### Dynamic Volumetric Method

[App page](https://appshunter.io/ios/app/dynamic-volumetric-method/id1067123805)

**In-app purchases:** none


### iECG

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dynamic Volumetric Method free?

Dynamic Volumetric Method costs $19.99, with no in-app purchases.

### Is iECG free?

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

### Do Dynamic Volumetric Method or iECG have ads?

Neither Dynamic Volumetric Method nor iECG shows ads.

### Which is updated more often, Dynamic Volumetric Method or iECG?

Dynamic Volumetric Method ships an update every 38 months, and iECG every 2 months. Most recently, Dynamic Volumetric Method was updated on September 18, 2026 and iECG on October 1, 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.*