# 看空气 vs T

The clearest difference is update cadence: T at every 5 weeks against 看空气's every 9 months. 看空气's advantage is iOS requirement (12.0 vs 15.6). 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.

看空气 ships an update every 9 months, T every 5 weeks. Both last shipped on November 2, 2026.

## The numbers

| Metric | 看空气 | T |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 22.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 19 MB | 33 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Everbest Machinery Industry Co.,Ltd](https://appshunter.io/developer/564470332) | [江波 夏](https://appshunter.io/developer/895730400) |

## What reviewers say

### 看空气

[App page](https://appshunter.io/ios/app/id1080089801)

**Features:** macOS Compatibility

**In-app purchases:** none


### T

[App page](https://appshunter.io/ios/app/t-sensor/id1457423534)

This utility app connects to nearby Bluetooth temperature sensors to display readings for temperature, humidity, air pressure, and altitude. It presents this data in both list and graph formats for easy viewing and analysis.

**Highlights:** Scans nearby Bluetooth temperature sensors, Displays temperature, humidity, air pressure, altitude, Data presented in list view, Data presented in graph view, Connects to external sensors

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

**In-app purchases:** none


## Frequently asked questions

### Is 看空气 free?

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

### Is T free?

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

### Do 看空气 or T have ads?

Neither 看空气 nor T shows ads.

### Which is updated more often, 看空气 or T?

看空气 ships an update every 9 months, and T every 5 weeks. Most recently, 看空气 was updated on November 2, 2026 and T on November 2, 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.*