# Pollution vs Zambretti Barometer

The clearest difference is price: Pollution at Free against Zambretti Barometer's $1.99. Pollution also leads on iOS requirement (15.6 vs 17.0). Zambretti Barometer's advantage is in-app purchases (none vs 10) and ads (none vs shown). On device support there is nothing between them.

Pollution is free to download; Zambretti Barometer costs $1.99 up front. Pollution sells 10 in-app purchases, starting at $1.19 per 7 days. Zambretti Barometer asks for nothing beyond the download.

Pollution ships an update every 3 weeks, Zambretti Barometer weekly. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Pollution | Zambretti Barometer |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.9 (19 ratings)](https://appshunter.io/ios/app/pollution-pollen-widget/id1609071301/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 144 MB | 7 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Stolanapp](https://appshunter.io/developer/1833017712) | [Robert Love](https://appshunter.io/developer/1868304766) |

## What reviewers say

### 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 |


### Zambretti Barometer

[App page](https://appshunter.io/ios/app/zambretti-barometer/id6777244231)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Pollution free?

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

### Is Zambretti Barometer free?

Zambretti Barometer costs $1.99, with no in-app purchases.

### Do Pollution or Zambretti Barometer have ads?

Pollution shows ads; Zambretti Barometer does not.

### Which is updated more often, Pollution or Zambretti Barometer?

Pollution ships an update every 3 weeks, and Zambretti Barometer weekly. Most recently, Pollution was updated on October 24, 2026 and Zambretti Barometer on October 9, 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.*