# AQ Indoor vs Radius PPM

The clearest difference is update cadence: Radius PPM at every 2 months against AQ Indoor's every 9 months. AQ Indoor's advantage is iOS requirement (12.0 vs 14). On price, ads, 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.

AQ Indoor ships an update every 9 months, Radius PPM every 2 months. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | AQ Indoor | Radius PPM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Size | 33 MB | 43 MB |
| Requires iOS | **12.0** | 14 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [XCSpec](https://appshunter.io/developer/1608100502) | [Radius Synergies International Private Limited](https://appshunter.io/developer/880536127) |

## What reviewers say

### AQ Indoor

[App page](https://appshunter.io/ios/app/aq-indoor/id1608100500)

**Features:** macOS Compatibility

**In-app purchases:** none


### Radius PPM

[App page](https://appshunter.io/ios/app/radius-ppm/id1662983744)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AQ Indoor free?

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

### Is Radius PPM free?

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

### Do AQ Indoor or Radius PPM have ads?

Neither AQ Indoor nor Radius PPM shows ads.

### Which is updated more often, AQ Indoor or Radius PPM?

AQ Indoor ships an update every 9 months, and Radius PPM every 2 months. Most recently, AQ Indoor was updated on October 11, 2026 and Radius PPM on October 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*