# Hydropolis vs Bajkowe Poddasze

The clearest difference is in-app purchases: Hydropolis at none against Bajkowe Poddasze's 1. Hydropolis also leads on iOS requirement (12.0 vs 15.1). Bajkowe Poddasze's advantage is update cadence (fortnightly vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. Bajkowe Poddasze sells 1 in-app purchase, starting at $4.99 per month. Hydropolis asks for nothing beyond the download.

Hydropolis ships an update every 10 months, Bajkowe Poddasze fortnightly. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Hydropolis | Bajkowe Poddasze |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 118 MB | 56 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [miejskie przedsiebiorstwo wodociagow i kanalizacji s.a](https://appshunter.io/developer/1444870860) | [Katarzyna Grzywa-Hilbrycht](https://appshunter.io/developer/1753924606) |

## What reviewers say

### Hydropolis

[App page](https://appshunter.io/ios/app/hydropolis/id1444870861)

Explore a water knowledge center through an audio guide. This app offers interactive exhibits and multimedia content to expand your understanding of water in an engaging and fun way.

**Highlights:** Audio guide functionality, Interactive installations, Multimedia content, Educational information, Engaging user experience

**Features:** macOS Compatibility

**In-app purchases:** none


### Bajkowe Poddasze

[App page](https://appshunter.io/ios/app/bajkowe-poddasze/id6504813554)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Miesięczna subskrypcja | $4.99 | per month |


## Frequently asked questions

### Is Hydropolis free?

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

### Is Bajkowe Poddasze free?

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

### Do Hydropolis or Bajkowe Poddasze have ads?

Neither Hydropolis nor Bajkowe Poddasze shows ads.

### Which is updated more often, Hydropolis or Bajkowe Poddasze?

Hydropolis ships an update every 10 months, and Bajkowe Poddasze fortnightly. Most recently, Hydropolis was updated on November 2, 2026 and Bajkowe Poddasze on November 4, 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.*