# MMS vs Air Quality (Mx)

The clearest difference is update cadence: Air Quality (Mx) at fortnightly against MMS's every 6 weeks. MMS's advantage is iOS requirement (13.0 vs 18.2). 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.

MMS ships an update every 6 weeks, Air Quality (Mx) fortnightly. The most recent releases landed on October 4, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | MMS | Air Quality (Mx) |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Size | 21 MB | 44 MB |
| Requires iOS | **13.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Multiservicios Médicos Santander, S.A. de C.V.](https://appshunter.io/developer/1450727874) | [VLADIMIR ILICH PEREZ FAJARDO](https://appshunter.io/developer/6805745096) |

## What reviewers say

### MMS

[App page](https://appshunter.io/ios/app/mms/id1450727875)

**Features:** macOS Compatibility

**In-app purchases:** none


### Air Quality (Mx)

[App page](https://appshunter.io/ios/app/air-quality-mx/id6805745094)

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

**In-app purchases:** none


## Frequently asked questions

### Is MMS free?

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

### Is Air Quality (Mx) free?

Air Quality (Mx) is free to download, with no in-app purchases.

### Do MMS or Air Quality (Mx) have ads?

Neither MMS nor Air Quality (Mx) shows ads.

### Which is updated more often, MMS or Air Quality (Mx)?

MMS ships an update every 6 weeks, and Air Quality (Mx) fortnightly. Most recently, MMS was updated on October 4, 2026 and Air Quality (Mx) on October 21, 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.*