# 水平仪 vs 券易用

The clearest difference is in-app purchases: 水平仪 at none against 券易用's 3. 券易用's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. 券易用 sells 3 in-app purchases, starting at $0.99 per month. 水平仪 asks for nothing beyond the download.

## The numbers

| Metric | 水平仪 | 券易用 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 3 days |
| Size | 15 MB | 7 MB |
| Requires iOS | **16** | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [子幸 聂](https://appshunter.io/developer/1881766687) | [WAN HOU KOU](https://appshunter.io/developer/1895367325) |

## What reviewers say

### 水平仪

[App page](https://appshunter.io/ios/app/id6760887699)

**In-app purchases:** none


### 券易用

[App page](https://appshunter.io/ios/app/id6763545720)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual Membership | $3.99 | per year |
| Permanent member | $6.99 | one-time |


## Frequently asked questions

### Is 水平仪 free?

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

### Is 券易用 free?

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

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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.*