# Valley Air District vs CA Heat Score

The clearest difference is rating: CA Heat Score at 5.0 against Valley Air District's 2.9. CA Heat Score also leads on update cadence (daily vs every 3 months). Valley Air District's advantage is ratings volume (67 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CA Heat Score holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: Valley Air District has 67 ratings behind it against 1, so its average is the more settled of the two.

Valley Air District ships an update every 3 months, CA Heat Score daily. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Valley Air District | CA Heat Score |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (67 ratings)](https://appshunter.io/ios/app/valley-air-district/id526195423/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ca-heat-score/id6760856821/reviews)** |
| Number of ratings | **67** | 1 |
| Positive reviews | 23.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free | Free |
| Size | 115 MB | 73 MB |
| Requires iOS | **14.2** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [San Joaquin Valley Air Pollution Control District](https://appshunter.io/developer/526130774) | [Michael Germino](https://appshunter.io/developer/1886547523) |

## What reviewers say

### Valley Air District

[App page](https://appshunter.io/ios/app/valley-air-district/id526195423)

Monitor real-time air quality in your neighborhoods with hourly data. Get personalized alerts for changes and wood burning status. Submit pollution complaints and receive episode alerts.

**Highlights:** Hourly air quality data, Location-based monitoring, Customizable locations, Air quality change notifications, Wood burning status, Pollution complaint submission, Air quality episode alerts

**Features:** macOS Compatibility

**In-app purchases:** none


### CA Heat Score

[App page](https://appshunter.io/ios/app/ca-heat-score/id6760856821)

Understand daily heat risk across California with real-time scores, forecasts, and safety guidance. Explore an interactive map and get detailed information for any ZIP code.

**Highlights:** Daily heat scores (0-4 scale), Interactive heatmap, 7-day heat score forecasts, Location detection, Heat safety guidance, ZIP code demographics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Valley Air District free?

Valley Air District is free to download, with no in-app purchases.

### Is CA Heat Score free?

CA Heat Score is free to download, with no in-app purchases.

### Which has better reviews, Valley Air District or CA Heat Score?

CA Heat Score is rated higher. Valley Air District averages 2.9 out of 5 from 67 ratings, while CA Heat Score averages 5.0 from 1 ratings.

### Do Valley Air District or CA Heat Score have ads?

Neither Valley Air District nor CA Heat Score shows ads.

### Which is updated more often, Valley Air District or CA Heat Score?

Valley Air District ships an update every 3 months, and CA Heat Score daily. Most recently, Valley Air District was updated on November 1, 2026 and CA Heat Score on October 31, 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.*