# Duosub vs ECG Articles

The clearest difference is in-app purchases: ECG Articles at none against Duosub's 1. ECG Articles also leads on update cadence (daily vs every 4 weeks). Duosub's advantage is ads (none vs shown) and iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Duosub sells 1 in-app purchase, starting at $1.99 per month. ECG Articles asks for nothing beyond the download.

Duosub ships an update every 4 weeks, ECG Articles daily. The most recent releases landed on October 11, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Duosub | ECG Articles |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Daily** |
| Size | 95 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [GOWS LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1734173309) | [KAIRI DAIHO](https://appshunter.io/developer/1845415966) |

## What reviewers say

### Duosub

[App page](https://appshunter.io/ios/app/duosub/id6507464076)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| チケット無制限プラン | $1.99 | per month |


### ECG Articles

[App page](https://appshunter.io/ios/app/ecg-articles/id6756026264)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Duosub free?

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

### Is ECG Articles free?

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

### Do Duosub or ECG Articles have ads?

ECG Articles shows ads; Duosub does not.

### Which is updated more often, Duosub or ECG Articles?

Duosub ships an update every 4 weeks, and ECG Articles daily. Most recently, Duosub was updated on October 11, 2026 and ECG Articles 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.*