# Käerjeng vs Eltrona Expert+

The clearest difference is update cadence: Käerjeng at weekly against Eltrona Expert+'s every 15 months. Eltrona Expert+'s advantage is iOS requirement (11.0 vs 16.0). 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.

Käerjeng ships an update weekly, Eltrona Expert+ every 15 months. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Käerjeng | Eltrona Expert+ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 15 months |
| Size | 75 MB | 17 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kaerjeng](https://appshunter.io/developer/1496970787) | [Eltrona Interdiffusion S.A.](https://appshunter.io/developer/1010701620) |

## What reviewers say

### Käerjeng

[App page](https://appshunter.io/ios/app/kaerjeng/id1496970788)

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

**In-app purchases:** none


### Eltrona Expert+

[App page](https://appshunter.io/ios/app/eltrona-expert-plus/id1614453090)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Käerjeng free?

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

### Is Eltrona Expert+ free?

Eltrona Expert+ is free to download, with no in-app purchases.

### Do Käerjeng or Eltrona Expert+ have ads?

Neither Käerjeng nor Eltrona Expert+ shows ads.

### Which is updated more often, Käerjeng or Eltrona Expert+?

Käerjeng ships an update weekly, and Eltrona Expert+ every 15 months. Most recently, Käerjeng was updated on September 14, 2026 and Eltrona Expert+ on September 21, 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.*