# 型钢截面 vs 海拔仪

The clearest difference is in-app purchases: 海拔仪 at none against 型钢截面's 2. 型钢截面's advantage is ads (none vs shown) and update cadence (every 4 days vs monthly). On price, device support and iOS requirement 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. 海拔仪 asks for nothing beyond the download.

型钢截面 ships an update every 4 days, 海拔仪 monthly. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 型钢截面 | 海拔仪 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Monthly |
| Size | 43 MB | 16 MB |
| Requires iOS | 16.4 | **15** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [涛 齐](https://appshunter.io/developer/6777093054) | [媛媛 钱](https://appshunter.io/developer/1869024065) |

## 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 |


### 海拔仪

[App page](https://appshunter.io/ios/app/id6782098514)

**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 海拔仪 free?

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

### Do 型钢截面 or 海拔仪 have ads?

海拔仪 shows ads; 型钢截面 does not.

### Which is updated more often, 型钢截面 or 海拔仪?

型钢截面 ships an update every 4 days, and 海拔仪 monthly. Most recently, 型钢截面 was updated on October 24, 2026 and 海拔仪 on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*