# Dsmart vs Pure Air

The clearest difference is update cadence: Pure Air at every 6 days against Dsmart's every 33 months. Pure Air also leads on iOS requirement (8.0 vs 12.0). 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.

Dsmart ships an update every 33 months, Pure Air every 6 days. The most recent releases landed on October 15, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Dsmart | Pure Air |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 6 days** |
| Size | 62 MB | 20 MB |
| Requires iOS | 12.0 | **8.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [深圳市卓联启航科技有限公司](https://appshunter.io/developer/1266211236) | [Kai Ho Leung](https://appshunter.io/developer/1465393899) |

## What reviewers say

### Dsmart

[App page](https://appshunter.io/ios/app/dsmart-thp/id1626434925)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pure Air

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dsmart free?

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

### Is Pure Air free?

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

### Do Dsmart or Pure Air have ads?

Neither Dsmart nor Pure Air shows ads.

### Which is updated more often, Dsmart or Pure Air?

Dsmart ships an update every 33 months, and Pure Air every 6 days. Most recently, Dsmart was updated on October 15, 2026 and Pure Air on October 27, 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.*