# Smog Poland vs Hydrozagadka

The clearest difference is in-app purchases: Hydrozagadka at none against Smog Poland's 4. Hydrozagadka also leads on iOS requirement (15.6 vs 18.0). Smog Poland's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Smog Poland sells 4 in-app purchases, starting at $0.99 per month. Hydrozagadka asks for nothing beyond the download.

Smog Poland ships an update every 3 weeks, Hydrozagadka every 4 months. The most recent releases landed on October 16, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Smog Poland | Hydrozagadka |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (10 ratings)](https://appshunter.io/ios/app/smog-poland/id1367444922/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 94.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 3 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wojciech Kulik](https://appshunter.io/developer/1291722220) | [LC Systems Sp. z o.o.](https://appshunter.io/developer/1030347995) |

## What reviewers say

### Smog Poland

[App page](https://appshunter.io/ios/app/smog-poland/id1367444922)

Monitor air quality across Poland with real-time data and automatic alerts. View air quality on a map and receive notifications to plan outdoor activities. Configure alerts for specific times to fit your daily routine.

**Highlights:** Real-time air quality monitoring, Automatic smog alerts, Interactive map of Poland, Customizable hourly notifications, Information on outdoor activity advisories

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Package | $0.99 | per month |
| Premium Package | $8.99 | per year |
| Premium | $17.99 | one-time |
| Premium Package (lifetime) | $17.99 | one-time |

**What reviewers like**

- 👍 Simple and readable
- 👍 Useful information
- 👍 Elegant interface
- 👍 Prompt alerts
- 👍 Good coverage of sensors

**What reviewers complain about**

- 🐛 Inaccurate location data
- 🐛 Difficult to check air quality
- 🐛 App shows old data
- 🐛 Widget doesn't refresh well
- 🐛 Apple Watch widget doesn't refresh

**Reported bugs**

- App not working on iOS26, always shows same measurement station
- App shows old data from stations that haven't sent data for days
- Widget on Apple Watch not refreshing

**Requested features**

- More widget options for Apple Watch
- Widget for Apple Watch


### Hydrozagadka

[App page](https://appshunter.io/ios/app/hydrozagadka/id1551237889)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Smog Poland free?

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

### Is Hydrozagadka free?

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

### Do Smog Poland or Hydrozagadka have ads?

Neither Smog Poland nor Hydrozagadka shows ads.

### Which is updated more often, Smog Poland or Hydrozagadka?

Smog Poland ships an update every 3 weeks, and Hydrozagadka every 4 months. Most recently, Smog Poland was updated on October 16, 2026 and Hydrozagadka on September 29, 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.*