# Pure Air vs MTF Digital Light

The clearest difference is update cadence: Pure Air at every 6 days against MTF Digital Light's every 5 weeks. Pure Air also leads on iOS requirement (8.0 vs 13.0). 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.

Pure Air ships an update every 6 days, MTF Digital Light every 5 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Pure Air | MTF Digital Light |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Size | 20 MB | 12 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Kai Ho Leung](https://appshunter.io/developer/1465393899) | [仕嘉 陈](https://appshunter.io/developer/1738026352) |

## What reviewers say

### Pure Air

[App page](https://appshunter.io/ios/app/pure-air/id1642065642)

**Features:** macOS Compatibility

**In-app purchases:** none


### MTF Digital Light

[App page](https://appshunter.io/ios/app/mtf-digital-light/id6480186630)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pure Air free?

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

### Is MTF Digital Light free?

MTF Digital Light is free to download, with no in-app purchases.

### Do Pure Air or MTF Digital Light have ads?

Neither Pure Air nor MTF Digital Light shows ads.

### Which is updated more often, Pure Air or MTF Digital Light?

Pure Air ships an update every 6 days, and MTF Digital Light every 5 weeks. Most recently, Pure Air was updated on October 27, 2026 and MTF Digital Light on October 25, 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.*