# Luopan Placement Ruler vs 日食 Eclipse

The clearest difference is price: Luopan Placement Ruler at Free against 日食 Eclipse's $2.99. Luopan Placement Ruler also leads on update cadence (every 3 days vs every 11 months). 日食 Eclipse's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Luopan Placement Ruler is free to download; 日食 Eclipse costs $2.99 up front. Luopan Placement Ruler sells 1 one-off in-app purchase. 日食 Eclipse asks for nothing beyond the download.

Luopan Placement Ruler ships an update every 3 days, 日食 Eclipse every 11 months. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Luopan Placement Ruler | 日食 Eclipse |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 11 months |
| Size | 413 MB | 32 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHEUNG PUI MAN](https://appshunter.io/developer/291179028) | [amtb fate](https://appshunter.io/developer/430174936) |

## What reviewers say

### Luopan Placement Ruler

[App page](https://appshunter.io/ios/app/luopan-placement-ruler/id412370642)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 数据无限保存 | $19.99 | one-time |


### 日食 Eclipse

[App page](https://appshunter.io/ios/app/eclipse/id915241865)

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

**In-app purchases:** none


## Frequently asked questions

### Is Luopan Placement Ruler free?

Luopan Placement Ruler is free to download, with in-app purchases available.

### Is 日食 Eclipse free?

日食 Eclipse costs $2.99, with no in-app purchases.

### Do Luopan Placement Ruler or 日食 Eclipse have ads?

Neither Luopan Placement Ruler nor 日食 Eclipse shows ads.

### Which is updated more often, Luopan Placement Ruler or 日食 Eclipse?

Luopan Placement Ruler ships an update every 3 days, and 日食 Eclipse every 11 months. Most recently, Luopan Placement Ruler was updated on October 10, 2026 and 日食 Eclipse on October 4, 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.*