# 水平仪 vs 伦敦地铁

The clearest difference is in-app purchases: 水平仪 at none against 伦敦地铁's 1. 水平仪 also leads on update cadence (every 4 weeks vs every 3 months). 伦敦地铁's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 伦敦地铁 sells 1 in-app purchase, starting at $1.99 per 7 days. 水平仪 asks for nothing beyond the download.

水平仪 ships an update every 4 weeks, 伦敦地铁 every 3 months. The most recent releases landed on October 6, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 水平仪 | 伦敦地铁 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 weeks** | Every 3 months |
| Size | 21 MB | 29 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [魁鹏 宋](https://appshunter.io/developer/977980685) | [燕燕 林](https://appshunter.io/developer/1675436596) |

## What reviewers say

### 水平仪

[App page](https://appshunter.io/ios/app/and/id6742847919)

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

**In-app purchases:** none


### 伦敦地铁

[App page](https://appshunter.io/ios/app/id6754589367)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 伦敦地铁尊贵会员 | $1.99 | per 7 days |


## Frequently asked questions

### Is 水平仪 free?

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

### Is 伦敦地铁 free?

伦敦地铁 is free to download, with in-app purchases available.

### Do 水平仪 or 伦敦地铁 have ads?

水平仪 shows ads; 伦敦地铁 does not.

### Which is updated more often, 水平仪 or 伦敦地铁?

水平仪 ships an update every 4 weeks, and 伦敦地铁 every 3 months. Most recently, 水平仪 was updated on October 6, 2026 and 伦敦地铁 on October 17, 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.*