# 铝型材读者 vs PDF

The clearest difference is in-app purchases: 铝型材读者 at none against PDF's 2. 铝型材读者 also leads on update cadence (daily vs every 2 days) and iOS requirement (13.0 vs 15.0). PDF's advantage is 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. 铝型材读者 asks for nothing beyond the download.

铝型材读者 ships an update daily, PDF every 2 days. The most recent releases landed on October 5, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 铝型材读者 | PDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 days |
| Size | 24 MB | 51 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [广东南海鹏博资讯有限公司](https://appshunter.io/developer/797318441) | [春燕 刘](https://appshunter.io/developer/6788007465) |

## What reviewers say

### 铝型材读者

[App page](https://appshunter.io/ios/app/id6758282535)

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

**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 铝型材读者 free?

铝型材读者 is free to download, with no in-app purchases.

### Is PDF free?

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

### Do 铝型材读者 or PDF have ads?

Neither 铝型材读者 nor PDF shows ads.

### Which is updated more often, 铝型材读者 or PDF?

铝型材读者 ships an update daily, and PDF every 2 days. Most recently, 铝型材读者 was updated on October 5, 2026 and PDF on October 29, 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.*