# Charleen vs by Eficium

The clearest difference is update cadence: Charleen at monthly against by Eficium's every 6 months. Charleen also leads on iOS requirement (15.1 vs 17.0). 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.

Charleen ships an update monthly, by Eficium every 6 months. The most recent releases landed on October 19, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Charleen | by Eficium |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Size | 50 MB | 19 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Samsic](https://appshunter.io/developer/1248400747) | [Eficium](https://appshunter.io/developer/1492456533) |

## What reviewers say

### Charleen

[App page](https://appshunter.io/ios/app/charleen/id1448852487)

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

**In-app purchases:** none


### by Eficium

[App page](https://appshunter.io/ios/app/by-eficium/id1492456534)

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

**In-app purchases:** none


## Frequently asked questions

### Is Charleen free?

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

### Is by Eficium free?

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

### Do Charleen or by Eficium have ads?

Neither Charleen nor by Eficium shows ads.

### Which is updated more often, Charleen or by Eficium?

Charleen ships an update monthly, and by Eficium every 6 months. Most recently, Charleen was updated on October 19, 2026 and by Eficium on October 20, 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.*