# Hydrartea vs OONIA Studio

The clearest difference is update cadence: OONIA Studio at weekly against Hydrartea's every 17 months. Hydrartea's advantage is iOS requirement (13.0 vs 15.3). 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.

Hydrartea ships an update every 17 months, OONIA Studio weekly. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Hydrartea | OONIA Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Weekly** |
| Size | 13 MB | 69 MB |
| Requires iOS | **13.0** | 15.3 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HYDRA ARTEA SOCIEDAD LIMITADA.](https://appshunter.io/developer/1765490504) | [Bocadil Infinite, S.L.](https://appshunter.io/developer/1255556638) |

## What reviewers say

### Hydrartea

[App page](https://appshunter.io/ios/app/hydrartea/id6670250240)

**Features:** Apple Wallet

**In-app purchases:** none


### OONIA Studio

[App page](https://appshunter.io/ios/app/oonia-studio/id6761606826)

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

**In-app purchases:** none


## Frequently asked questions

### Is Hydrartea free?

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

### Is OONIA Studio free?

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

### Do Hydrartea or OONIA Studio have ads?

Neither Hydrartea nor OONIA Studio shows ads.

### Which is updated more often, Hydrartea or OONIA Studio?

Hydrartea ships an update every 17 months, and OONIA Studio weekly. Most recently, Hydrartea was updated on October 24, 2026 and OONIA Studio on October 14, 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.*