# S4DX Samples vs Courai

The clearest difference is in-app purchases: S4DX Samples at none against Courai's 1. Courai's advantage is update cadence (weekly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Courai sells 1 one-off in-app purchase. S4DX Samples asks for nothing beyond the download.

S4DX Samples ships an update every 3 months, Courai weekly. The most recent releases landed on September 24, 2026 and August 24, 2026 respectively.

## The numbers

| Metric | S4DX Samples | Courai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 80 MB | 78 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [S4DX GmbH](https://appshunter.io/developer/1530214621) | [Murat Hudavendigar Oncu](https://appshunter.io/developer/1896337218) |

## What reviewers say

### S4DX Samples

[App page](https://appshunter.io/ios/app/s4dx-samples/id1530214619)

**In-app purchases:** none


### Courai

[App page](https://appshunter.io/ios/app/courai/id6766915688)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Courai | $9.99 | one-time |


## Frequently asked questions

### Is S4DX Samples free?

S4DX Samples is free to download, with no in-app purchases.

### Is Courai free?

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

### Do S4DX Samples or Courai have ads?

Neither S4DX Samples nor Courai shows ads.

### Which is updated more often, S4DX Samples or Courai?

S4DX Samples ships an update every 3 months, and Courai weekly. Most recently, S4DX Samples was updated on September 24, 2026 and Courai on August 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*