# Hydra Museum vs OneClickSchool

The clearest difference is iOS requirement: Hydra Museum at 11.0 against OneClickSchool's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Hydra Museum | OneClickSchool |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free |
| Size | 237 MB | 100 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Katatexilux](https://appshunter.io/developer/1525689843) | [Sigma Sistemi](https://appshunter.io/developer/1596463489) |

## What reviewers say

### Hydra Museum

[App page](https://appshunter.io/ios/app/hydra-museum/id1581445838)

**Features:** macOS Compatibility

**In-app purchases:** none


### OneClickSchool

[App page](https://appshunter.io/ios/app/oneclickschool/id1596463487)

Access grades, absences, lesson topics, and administrative information like invoices. Facilitates parent-teacher conferences and school-family communications with a user-friendly interface and timely notifications.

**Highlights:** View grades and absences, Track lesson topics, Consult administrative information, Manage parent-teacher conferences, Receive school communications, Intuitive and fast interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Hydra Museum free?

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

### Is OneClickSchool free?

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

### Do Hydra Museum or OneClickSchool have ads?

Neither Hydra Museum nor OneClickSchool shows ads.

### Which is updated more often, Hydra Museum or OneClickSchool?

Hydra Museum ships an update weekly, and OneClickSchool weekly. Most recently, Hydra Museum was updated on October 25, 2026 and OneClickSchool on October 30, 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.*