# Smog Report vs SJVAir

The clearest difference is rating: Smog Report at 5.0 against SJVAir's 4.5. Smog Report also leads on update cadence (weekly vs monthly). SJVAir's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Smog Report sells 4 one-off in-app purchases. SJVAir asks for nothing beyond the download.

Smog Report holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Smog Report ships an update weekly, SJVAir monthly. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Smog Report | SJVAir |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/smog-report/id607748201/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/sjvair/id6448961840/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 47.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 6 MB |
| Requires iOS | 26.4 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Embay, LLC](https://appshunter.io/developer/1730783354) | [Central California Asthma Collaborative](https://appshunter.io/developer/1687175572) |

## What reviewers say

### Smog Report

[App page](https://appshunter.io/ios/app/smog-report/id607748201)

Monitor global air quality with real-time AQI data and forecasts. The app uses on-device AI for plain-English assessments and personalized tips, with visual cues reflecting current conditions. It offers extensive language support and privacy-focused processing.

**Highlights:** Real-time AQI for current location, On-device AI for daily assessments and tips, 5-day pollutant forecast, Live Activity alerts, Historical trend charts, Widgets for Home/Lock Screen, Apple Watch app

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fresh Air | $0.99 | one-time |
| Clear Skies | $2.99 | one-time |
| Perfect Day | $4.99 | one-time |
| Clean Air Hero | $9.99 | one-time |


### SJVAir

[App page](https://appshunter.io/ios/app/sjvair/id6448961840)

Track your local air quality in real-time with hourly PM2.5 concentration data. Receive outdoor activity guidelines and get live notifications when air quality becomes hazardous. Explore a monitor map and view historical data.

**Highlights:** Real-time air quality monitoring, Hourly PM2.5 concentration data, Outdoor activity guidelines, Hazardous air notifications, Monitor map with historical data, Data download for analysis

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

**In-app purchases:** none


## Frequently asked questions

### Is Smog Report free?

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

### Is SJVAir free?

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

### Which has better reviews, Smog Report or SJVAir?

Smog Report is rated higher. Smog Report averages 5.0 out of 5 from 2 ratings, while SJVAir averages 4.5 from 2 ratings.

### Do Smog Report or SJVAir have ads?

Smog Report shows ads; SJVAir does not.

### Which is updated more often, Smog Report or SJVAir?

Smog Report ships an update weekly, and SJVAir monthly. Most recently, Smog Report was updated on November 10, 2026 and SJVAir on November 3, 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.*