# 知拾收藏 vs 迅疾PDF转换器

The clearest difference is update cadence: 知拾收藏 at every 2 weeks against 迅疾PDF转换器's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 知拾收藏 sells 1 in-app purchase, starting at $17.49 per year and 迅疾PDF转换器 sells 2 in-app purchases, starting at $3.49 per month. Whichever you choose, the download price is not the number that matters.

知拾收藏 ships an update every 2 weeks, 迅疾PDF转换器 every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 知拾收藏 | 迅疾PDF转换器 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 55 MB | 32 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [俊杰 黄](https://appshunter.io/developer/1132845873) | [进韬 张](https://appshunter.io/developer/1561446867) |

## What reviewers say

### 知拾收藏

[App page](https://appshunter.io/ios/app/id1522454327)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 知拾收藏小绿叶高级版 | $17.49 | per year |


### 迅疾PDF转换器

[App page](https://appshunter.io/ios/app/pdf/id6443480605)

This app facilitates rapid conversion between PDF and various document formats, including Word, JPG, PPT, and Excel. Its stable core ensures accurate conversions without data loss, catering to diverse user needs.

**Highlights:** PDF to Word conversion, PDF to JPG conversion, PDF to PPT conversion, PDF to Excel conversion, Word to PDF conversion, Image to PDF conversion, Accurate conversion results

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF转换器高级月费订阅 | $3.49 | per month |
| PDF转换器高级年费订阅 | $9.99 | per year |


## Frequently asked questions

### Is 知拾收藏 free?

知拾收藏 is free to download, with in-app purchases available.

### Is 迅疾PDF转换器 free?

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

### Do 知拾收藏 or 迅疾PDF转换器 have ads?

Both 知拾收藏 and 迅疾PDF转换器 show ads.

### Which is updated more often, 知拾收藏 or 迅疾PDF转换器?

知拾收藏 ships an update every 2 weeks, and 迅疾PDF转换器 every 2 months. Most recently, 知拾收藏 was updated on October 25, 2026 and 迅疾PDF转换器 on October 24, 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.*