# Chi Rho vs ECG Audio

The clearest difference is in-app purchases: Chi Rho at none against ECG Audio's 1. Chi Rho also leads on update cadence (every 5 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ECG Audio sells 1 one-off in-app purchase. Chi Rho asks for nothing beyond the download.

Chi Rho ships an update every 5 weeks, ECG Audio every 2 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Chi Rho | ECG Audio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Size | 49 MB | 21 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [MB 360, LLC](https://appshunter.io/developer/1726635551) | [Nordavind](https://appshunter.io/developer/637520063) |

## What reviewers say

### Chi Rho

[App page](https://appshunter.io/ios/app/chi-rho/id1526690782)

**Features:** macOS Compatibility

**In-app purchases:** none


### ECG Audio

[App page](https://appshunter.io/ios/app/ecg-audio/id1541142830)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full app version | $0.99 | one-time |


## Frequently asked questions

### Is Chi Rho free?

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

### Is ECG Audio free?

ECG Audio is free to download, with in-app purchases available.

### Do Chi Rho or ECG Audio have ads?

Neither Chi Rho nor ECG Audio shows ads.

### Which is updated more often, Chi Rho or ECG Audio?

Chi Rho ships an update every 5 weeks, and ECG Audio every 2 months. Most recently, Chi Rho was updated on November 7, 2026 and ECG Audio on November 3, 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.*