# 南风有痕 vs 通达T20

The clearest difference is update cadence: 通达T20 at every 3 weeks against 南风有痕's every 11 months. 南风有痕's advantage is iOS requirement (12.2 vs 15.1). 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.

南风有痕 ships an update every 11 months, 通达T20 every 3 weeks. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 南风有痕 | 通达T20 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 weeks** |
| Size | 83 MB | 73 MB |
| Requires iOS | **12.2** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Shenzhen 2bulu Information Technology Co. Ltd.](https://appshunter.io/developer/1193862719) | [北京通达信科科技有限公司](https://appshunter.io/developer/1018115125) |

## What reviewers say

### 南风有痕

[App page](https://appshunter.io/ios/app/id6448814867)

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

**In-app purchases:** none


### 通达T20

[App page](https://appshunter.io/ios/app/t20/id6784624086)

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

**In-app purchases:** none


## Frequently asked questions

### Is 南风有痕 free?

南风有痕 is free to download, with no in-app purchases.

### Is 通达T20 free?

通达T20 is free to download, with no in-app purchases.

### Do 南风有痕 or 通达T20 have ads?

Neither 南风有痕 nor 通达T20 shows ads.

### Which is updated more often, 南风有痕 or 通达T20?

南风有痕 ships an update every 11 months, and 通达T20 every 3 weeks. Most recently, 南风有痕 was updated on October 7, 2026 and 通达T20 on October 9, 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.*