# KLESIA & Moi vs Hydrium

The clearest difference is in-app purchases: KLESIA & Moi at none against Hydrium's 2. KLESIA & Moi also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Hydrium sells 2 one-off in-app purchases. KLESIA & Moi asks for nothing beyond the download.

KLESIA & Moi ships an update weekly, Hydrium every 4 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | KLESIA & Moi | Hydrium |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Size | 26 MB | 9 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [KLESIA](https://appshunter.io/developer/1166466048) | [Christophe Fromage](https://appshunter.io/developer/6816162518) |

## What reviewers say

### KLESIA & Moi

[App page](https://appshunter.io/ios/app/klesia-and-moi/id6779630289)

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

**In-app purchases:** none


### Hydrium

[App page](https://appshunter.io/ios/app/hydrium/id6816415433)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Hydrium Plus | $2.99 | one-time |


## Frequently asked questions

### Is KLESIA & Moi free?

KLESIA & Moi is free to download, with no in-app purchases.

### Is Hydrium free?

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

### Do KLESIA & Moi or Hydrium have ads?

Neither KLESIA & Moi nor Hydrium shows ads.

### Which is updated more often, KLESIA & Moi or Hydrium?

KLESIA & Moi ships an update weekly, and Hydrium every 4 days. Most recently, KLESIA & Moi was updated on October 25, 2026 and Hydrium on October 31, 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.*