# 专利大王 vs Page Vault Reader

The clearest difference is price: 专利大王 at Free against Page Vault Reader's $1.99. 专利大王 also leads on iOS requirement (12.0 vs 18.5). Page Vault Reader's advantage is in-app purchases (none vs 5) and ads (none vs shown). On device support there is nothing between them.

专利大王 is free to download; Page Vault Reader costs $1.99 up front. 专利大王 sells 5 one-off in-app purchases. Page Vault Reader asks for nothing beyond the download.

专利大王 ships an update every 5 weeks, Page Vault Reader every 3 days. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | 专利大王 | Page Vault Reader |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Size | 36 MB | 12 MB |
| Requires iOS | **12.0** | 18.5 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BEIJING INCOIDEA CO.LTD](https://appshunter.io/developer/1262262808) | [建亮 王](https://appshunter.io/developer/1859821300) |

## What reviewers say

### 专利大王

[App page](https://appshunter.io/ios/app/id1091971568)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 专利大王VIP月卡 | $8.99 | one-time |
| 专利大王VIP季卡 | $19.99 | one-time |
| 专利大王VIP半年卡 | $34.99 | one-time |
| 专利大王VIP年卡 | $59.99 | one-time |
| 专利大王VIP年费会员 | $64.99 | one-time |


### Page Vault Reader

[App page](https://appshunter.io/ios/app/page-vault-reader/id6758269117)

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

**In-app purchases:** none


## Frequently asked questions

### Is 专利大王 free?

专利大王 is free to download, with in-app purchases available.

### Is Page Vault Reader free?

Page Vault Reader costs $1.99, with no in-app purchases.

### Do 专利大王 or Page Vault Reader have ads?

专利大王 shows ads; Page Vault Reader does not.

### Which is updated more often, 专利大王 or Page Vault Reader?

专利大王 ships an update every 5 weeks, and Page Vault Reader every 3 days. Most recently, 专利大王 was updated on November 6, 2026 and Page Vault Reader on November 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.*