# O2Quality vs The Pollen Forecast Checker

The clearest difference is in-app purchases: O2Quality at none against The Pollen Forecast Checker's 2. O2Quality also leads on ads (none vs shown). The Pollen Forecast Checker's advantage is iOS requirement (15.6 vs 27.0). On price, review sentiment, update cadence and device support there is nothing between them.

Both are free to download. The Pollen Forecast Checker sells 2 in-app purchases, starting at $3.99 per month. O2Quality asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | O2Quality | The Pollen Forecast Checker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (4 ratings)](https://appshunter.io/ios/app/the-pollen-forecast-checker/id6743779989/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 11 MB | 67 MB |
| Requires iOS | 27.0 | **15.6** |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Tomohiko Shimizu](https://appshunter.io/developer/436129129) | [Vida Apps Incorporated](https://appshunter.io/developer/1580682451) |

## What reviewers say

### O2Quality

[App page](https://appshunter.io/ios/app/o2quality/id1570058656)

Provides real-time air quality information based on US and European Air Quality Index (AQI) standards. It forecasts pollutant levels for up to five days, including carbon monoxide, ozone, nitrogen dioxide, sulfur dioxide, PM2.5, and PM10.

**Highlights:** Real-time AQI reporting, US and European AQI standards, Forecasts for 6 pollutants, 5-day pollutant forecasts, Color-coded risk levels, Pollutant concentration data

**Features:** Vision Pro support

**In-app purchases:** none


### The Pollen Forecast Checker

[App page](https://appshunter.io/ios/app/the-pollen-forecast-checker/id6743779989)

This app provides a clear and simple forecast of airborne pollen types and their quantities. It helps users with allergies take proactive measures to manage symptoms by displaying current and future pollen levels.

**Highlights:** Current pollen information by location, Pollen types and quantities displayed, 5-day pollen forecast, Visual indicators for pollen levels, Simple and clutter-free UI

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan - 1 Month | $3.99 | per month |
| Premium Plan - 3 Month | $9.99 | per 3 months |


## Frequently asked questions

### Is O2Quality free?

O2Quality is free to download, with no in-app purchases.

### Is The Pollen Forecast Checker free?

The Pollen Forecast Checker is free to download, with in-app purchases available.

### Do O2Quality or The Pollen Forecast Checker have ads?

The Pollen Forecast Checker shows ads; O2Quality does not.

### Which is updated more often, O2Quality or The Pollen Forecast Checker?

O2Quality ships an update every 4 months, and The Pollen Forecast Checker every 4 months. Most recently, O2Quality was updated on November 3, 2026 and The Pollen Forecast Checker on November 8, 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.*