# 好运气 vs PDF

The clearest difference is in-app purchases: 好运气 at none against PDF's 2. 好运气 also leads on iOS requirement (10.2 vs 15.0). PDF's advantage is update cadence (every 2 days vs monthly) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. PDF sells 1 in-app purchase, starting at $0.99 per month. 好运气 asks for nothing beyond the download.

好运气 ships an update monthly, PDF every 2 days. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 好运气 | PDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 43 MB | 51 MB |
| Requires iOS | **10.2** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Greatgas E-commerce Co., Ltd.](https://appshunter.io/developer/1084594382) | [春燕 刘](https://appshunter.io/developer/6788007465) |

## What reviewers say

### 好运气

[App page](https://appshunter.io/ios/app/id1139707130)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF

[App page](https://appshunter.io/ios/app/pdf-master/id6788211780)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDFMaster Monthly Subscription | $0.99 | per month |


## Frequently asked questions

### Is 好运气 free?

好运气 is free to download, with no in-app purchases.

### Is PDF free?

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

### Do 好运气 or PDF have ads?

Neither 好运气 nor PDF shows ads.

### Which is updated more often, 好运气 or PDF?

好运气 ships an update monthly, and PDF every 2 days. Most recently, 好运气 was updated on October 26, 2026 and PDF on October 28, 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.*