# Zrak vs Pollution

The clearest difference is rating: Pollution at 4.9 against Zrak's 4.4. Pollution also leads on update cadence (every 3 weeks vs every 5 months) and iOS requirement (15.6 vs 26.0). Zrak's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Pollution sells 10 in-app purchases, starting at $1.19 per 7 days. Zrak asks for nothing beyond the download.

Pollution holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 7 and 18 respectively. Written reviews complicate that: 100% of Zrak's written reviews are positive against 83% of Pollution's, so the app with the better star average is not the one people write more warmly about.

Zrak ships an update every 5 months, Pollution every 3 weeks. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Zrak | Pollution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/zrak/id1545240801/reviews) | **[4.9 (18 ratings)](https://appshunter.io/ios/app/pollution-pollen-widget/id1609071301/reviews)** |
| Number of ratings | 7 | **18** |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 144 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tarik Dahic](https://appshunter.io/developer/1545240803) | [Stolanapp](https://appshunter.io/developer/1833017712) |

## What reviewers say

### Zrak

[App page](https://appshunter.io/ios/app/zrak/id1545240801)

This app provides real-time air quality data for your city, including daily and weekly AQI values. It offers detailed views of monitoring stations and their parameters, with map integration. Customizable widgets allow for quick access to air quality information on your home screen.

**Highlights:** Daily AQI display, Weekly AQI tracking, Detailed monitoring station view, Sensor map for each city, Home screen widgets, Dark mode support

**Features:** macOS Compatibility

**In-app purchases:** none


### Pollution

[App page](https://appshunter.io/ios/app/pollution-pollen-widget/id1609071301)

Track real-time air quality and pollution levels in your area. Get detailed pollutant breakdowns, hourly and multi-day forecasts, and health recommendations to make informed decisions about your environment and well-being.

**Highlights:** Real-time Air Quality Index (AQI), Detailed pollutant breakdown, Hourly and 4-day forecasts, Smart notifications, Health recommendations, User-friendly design

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Umbrella - Premium | $1.19 | per 7 days |
| Umbrella - Premium | $2.19 | per 7 days |
| Air Quality Index - Premium | $2.29 | per month |
| Air Quality Premium Discount | $3.99 | per year |
| Umbrella - Premium | $4.29 | per month |
| Umbrella - Premium | $4.99 | per month |
| Air Quality Index - Premium | $5.69 | per year |
| Umbrella - Premium | $5.69 | per year |
| Air Quality Index - Premium | $11.49 | per year |
| Air Quality Index - Premium | $11.49 | per year |


## Frequently asked questions

### Is Zrak free?

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

### Is Pollution free?

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

### Which has better reviews, Zrak or Pollution?

Pollution is rated higher. Zrak averages 4.4 out of 5 from 7 ratings, while Pollution averages 4.9 from 18 ratings.

### Do Zrak or Pollution have ads?

Pollution shows ads; Zrak does not.

### Which is updated more often, Zrak or Pollution?

Zrak ships an update every 5 months, and Pollution every 3 weeks. Most recently, Zrak was updated on October 9, 2026 and Pollution on October 18, 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.*