# 型钢截面 vs 晴空预报AI

The clearest difference is in-app purchases: 晴空预报AI at none against 型钢截面's 2. 晴空预报AI also leads on iOS requirement (13.0 vs 16.4). 型钢截面's advantage is update cadence (every 4 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. 型钢截面 sells 2 in-app purchases, starting at $0.99 per month. 晴空预报AI asks for nothing beyond the download.

型钢截面 ships an update every 4 days, 晴空预报AI fortnightly. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 型钢截面 | 晴空预报AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 43 MB | 158 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [涛 齐](https://appshunter.io/developer/6777093054) | [书欣 李](https://appshunter.io/developer/1868307838) |

## What reviewers say

### 型钢截面

[App page](https://appshunter.io/ios/app/id6777681920)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级版 · 月费 | $0.99 | per month |
| 高级版 · 年费 | $2.99 | per year |


### 晴空预报AI

[App page](https://appshunter.io/ios/app/ai/id6788593360)

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

**In-app purchases:** none


## Frequently asked questions

### Is 型钢截面 free?

型钢截面 is free to download, with in-app purchases available.

### Is 晴空预报AI free?

晴空预报AI is free to download, with no in-app purchases.

### Do 型钢截面 or 晴空预报AI have ads?

Neither 型钢截面 nor 晴空预报AI shows ads.

### Which is updated more often, 型钢截面 or 晴空预报AI?

型钢截面 ships an update every 4 days, and 晴空预报AI fortnightly. Most recently, 型钢截面 was updated on October 24, 2026 and 晴空预报AI on October 7, 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.*