# FengShui Transparent Compass vs PDFReader

The clearest difference is price: PDFReader at Free against FengShui Transparent Compass's $39.99. FengShui Transparent Compass's advantage is in-app purchases (none vs 2) and ads (none vs shown).

PDFReader is free to download; FengShui Transparent Compass costs $39.99 up front. PDFReader sells 2 in-app purchases, starting at $9.99 per month. FengShui Transparent Compass asks for nothing beyond the download.

FengShui Transparent Compass ships an update every 3 weeks, PDFReader every 2 months. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | FengShui Transparent Compass | PDFReader |
| --- | --- | --- |
| Price | $39.99 | **Free** |
| Positive reviews | 53.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Paid | — |
| Size | 79 MB | 14 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [amtb fate](https://appshunter.io/developer/430174936) | [克 谢](https://appshunter.io/developer/1722475771) |

## What reviewers say

### FengShui Transparent Compass

[App page](https://appshunter.io/ios/app/fengshui-transparent-compass/id1422196592)

This tool measures orientation on maps and architectural plans, acting as a transparent compass overlay. It offers various polar scales, base map options, and central positioning tools for detailed Feng Shui assessment.

**Highlights:** Transparent compass overlay, Polar scale measurement, Map and image base maps, Central positioning tools, File management with previews, iCloud backup and recovery

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

**In-app purchases:** none


### PDFReader

[App page](https://appshunter.io/ios/app/pdfreader-ai-pdf-assistant/id6758230344)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $9.99 | per month |
| Yearly Pro | $49.99 | per year |


## Frequently asked questions

### Is FengShui Transparent Compass free?

FengShui Transparent Compass costs $39.99, with no in-app purchases.

### Is PDFReader free?

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

### Do FengShui Transparent Compass or PDFReader have ads?

PDFReader shows ads; FengShui Transparent Compass does not.

### Which is updated more often, FengShui Transparent Compass or PDFReader?

FengShui Transparent Compass ships an update every 3 weeks, and PDFReader every 2 months. Most recently, FengShui Transparent Compass was updated on October 13, 2026 and PDFReader on October 9, 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.*