# SYTTPMS vs Pure Air

The clearest difference is update cadence: Pure Air at every 6 days against SYTTPMS's every 2 months. 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.

SYTTPMS ships an update every 2 months, Pure Air every 6 days. The most recent releases landed on October 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | SYTTPMS | Pure Air |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Size | 1 MB | 20 MB |
| Requires iOS | 13.0 | **8.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Shenyongtong Industry Co., Ltd.](https://appshunter.io/developer/776724937) | [Kai Ho Leung](https://appshunter.io/developer/1465393899) |

## What reviewers say

### SYTTPMS

[App page](https://appshunter.io/ios/app/syttpms/id1031107627)

**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 SYTTPMS free?

SYTTPMS 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 SYTTPMS or Pure Air have ads?

Neither SYTTPMS nor Pure Air shows ads.

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

SYTTPMS ships an update every 2 months, and Pure Air every 6 days. Most recently, SYTTPMS was updated on October 1, 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.*