# 미세먼지SOS vs P.TOS

The clearest difference is update cadence: P.TOS at fortnightly against 미세먼지SOS's every 32 months. 미세먼지SOS's advantage is iOS requirement (13.0 vs 15.5). 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.

미세먼지SOS ships an update every 32 months, P.TOS fortnightly. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 미세먼지SOS | P.TOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Fortnightly** |
| Size | 175 MB | 94 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ecoplay Co., Ltd.](https://appshunter.io/developer/1497635995) | [Phoenixdarts Co., Ltd.](https://appshunter.io/developer/435063659) |

## What reviewers say

### 미세먼지SOS

[App page](https://appshunter.io/ios/app/sos/id1469479883)

**Features:** macOS Compatibility

**In-app purchases:** none


### P.TOS

[App page](https://appshunter.io/ios/app/ptos/id6505145997)

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

**In-app purchases:** none


## Frequently asked questions

### Is 미세먼지SOS free?

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

### Is P.TOS free?

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

### Do 미세먼지SOS or P.TOS have ads?

Neither 미세먼지SOS nor P.TOS shows ads.

### Which is updated more often, 미세먼지SOS or P.TOS?

미세먼지SOS ships an update every 32 months, and P.TOS fortnightly. Most recently, 미세먼지SOS was updated on October 17, 2026 and P.TOS on October 7, 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.*