# cda.pl vs Hydropolis

The clearest difference is review sentiment: cda.pl at 78% against Hydropolis's 17%. cda.pl also leads on update cadence (every 3 weeks vs every 10 months). Hydropolis's advantage is in-app purchases (none vs 8). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. cda.pl sells 8 in-app purchases, starting at $2.49 per month. Hydropolis asks for nothing beyond the download.

cda.pl ships an update every 3 weeks, Hydropolis every 10 months. The most recent releases landed on October 12, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | cda.pl | Hydropolis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (160 ratings)](https://appshunter.io/ios/app/cdapl/id1318175670/reviews)** | — |
| Number of ratings | **160** | — |
| Positive reviews | **77.7% of reviews** | 16.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 10 months |
| Monetization | Subscription | **Free** |
| Size | 59 MB | 118 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [CDA S.A.](https://appshunter.io/developer/1318175669) | [miejskie przedsiebiorstwo wodociagow i kanalizacji s.a](https://appshunter.io/developer/1444870860) |

## What reviewers say

### cda.pl

[App page](https://appshunter.io/ios/app/cdapl/id1318175670)

Access a vast library of films and series legally and in high quality directly from your phone or tablet. Stream content to your TV using Chromecast and download titles for offline viewing. Enjoy Polish voiceovers, subtitles, and dubbing for cartoons.

**Highlights:** Access to premium films and series, Chromecast support for TV streaming, Offline viewing of downloaded content, Polish voiceovers, subtitles, and dubbing, Legal and high-quality streaming, Content from verified distributors

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CDA TV | $2.49 | per month |
| CDA Premium | $5.99 | per month |
| CDA Premium 2 | $5.99 | per month |
| CDA Premium + TV Start | $5.99 | per month |
| CDA TV | $8.99 | per month |
| CDA Premium + TV Basic | $11.99 | per month |
| CDA Premium 3 | $52.99 | per year |
| CDA Premium 4 | $52.99 | per year |

**What reviewers like**

- 📚 Large selection of movies and TV shows
- 💰 Free content available without subscription
- 🎬 Classic and retro films (80s/90s movies)
- 📱 Works well on multiple devices (iPhone, Apple TV)
- 🌍 Accessible outside Poland

**What reviewers complain about**

- 🐛 Server overload and frequent crashes
- ⏱️ Constant buffering and loading issues
- 🔒 Geo-blocking outside Poland despite premium
- 💳 Premium doesn't unlock all content
- 🔍 Search function returns only premium results

**Reported bugs**

- App crashes on main profile (FireTV)
- Videos freeze and buffer every 2 minutes
- AirPlay functionality broken
- App doesn't remember pause position
- Login errors with Apple ID on TV

**Requested features**

- Arabic and English language options
- Improved search functionality for user videos
- Language settings easier to access
- Live TV functionality
- Sync between app and website profiles


### 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


## Frequently asked questions

### Is cda.pl free?

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

### Is Hydropolis free?

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

### Do cda.pl or Hydropolis have ads?

Neither cda.pl nor Hydropolis shows ads.

### Which is updated more often, cda.pl or Hydropolis?

cda.pl ships an update every 3 weeks, and Hydropolis every 10 months. Most recently, cda.pl was updated on October 12, 2026 and Hydropolis on October 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.*