# 잠잠 vs xon training

The clearest difference is update cadence: xon training at every 4 days against 잠잠's every 8 months. xon training also leads on iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

잠잠 ships an update every 8 months, xon training every 4 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 잠잠 | xon training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 days** |
| Size | 10 MB | 48 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [DAESEONG KIM](https://appshunter.io/developer/1703442466) | [seonmyoung kim](https://appshunter.io/developer/1658472170) |

## What reviewers say

### 잠잠

[App page](https://appshunter.io/ios/app/id6756749527)

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

**In-app purchases:** none


### xon training

[App page](https://appshunter.io/ios/app/xon-training/id6760121153)

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

**In-app purchases:** none


## Frequently asked questions

### Is 잠잠 free?

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

### Is xon training free?

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

### Do 잠잠 or xon training have ads?

Neither 잠잠 nor xon training shows ads.

### Which is updated more often, 잠잠 or xon training?

잠잠 ships an update every 8 months, and xon training every 4 days. Most recently, 잠잠 was updated on October 28, 2026 and xon training on October 24, 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.*