# Heliograph vs Air Quality ◎

The clearest difference is ads: Heliograph at none against Air Quality ◎'s shown. Air Quality ◎'s advantage is iOS requirement (15.0 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Heliograph | Air Quality ◎ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 16 MB | 75 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | **iPhone, Apple TV, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Aphelion Engineering Pty Ltd](https://appshunter.io/developer/1896778280) | [Devolim](https://appshunter.io/developer/1823631894) |

## What reviewers say

### Heliograph

[App page](https://appshunter.io/ios/app/heliograph/id6783219208)

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

**In-app purchases:** none


### Air Quality ◎

[App page](https://appshunter.io/ios/app/air-quality/id6795859508)

Get real-time air quality information for your city, including the main pollutant and its cause. Receive alerts for air quality changes and customize notifications based on your sensitivity profile. A widget provides at-a-glance updates without opening the app.

**Highlights:** Real-time AQI and pollutant concentration, Supports multiple international AQI scales, Weather factors explained, Global pollution map and city ranking, Customizable alerts, Personalized sensitivity profiles, Home screen widget

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

**In-app purchases:** none


## Frequently asked questions

### Is Heliograph free?

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

### Is Air Quality ◎ free?

Air Quality ◎ is free to download, with no in-app purchases.

### Do Heliograph or Air Quality ◎ have ads?

Air Quality ◎ shows ads; Heliograph does not.

### Which is updated more often, Heliograph or Air Quality ◎?

Heliograph ships an update every 2 months, and Air Quality ◎ every 2 months. Most recently, Heliograph was updated on October 31, 2026 and Air Quality ◎ on November 6, 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.*