# 灵线 vs 建工计算器

The clearest difference is in-app purchases: 建工计算器 at none against 灵线's 2. 建工计算器 also leads on iOS requirement (15.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. 灵线 sells 2 in-app purchases, starting at $4.99 per month. 建工计算器 asks for nothing beyond the download.

## The numbers

| Metric | 灵线 | 建工计算器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Size | 28 MB | 3 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hefei Yi Qicheng Technology Co., Ltd.](https://appshunter.io/developer/1895580826) | [雨雪 雷](https://appshunter.io/developer/1896522689) |

## What reviewers say

### 灵线

[App page](https://appshunter.io/ios/app/pdfai/id6763971571)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度订阅 | $4.99 | per month |
| 年度订阅 | $39.99 | per year |


### 建工计算器

[App page](https://appshunter.io/ios/app/id6791598985)

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

**In-app purchases:** none


## Frequently asked questions

### Is 灵线 free?

灵线 is free to download, with in-app purchases available.

### Is 建工计算器 free?

建工计算器 is free to download, with no in-app purchases.

### Do 灵线 or 建工计算器 have ads?

Neither 灵线 nor 建工计算器 shows ads.

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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.*