# 机灵象英文单词 vs PDF Reader Scan & Edit

The clearest difference is in-app purchases: 机灵象英文单词 at none against PDF Reader Scan & Edit's 4. 机灵象英文单词 also leads on ads (none vs shown) and update cadence (every 5 days vs every 4 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Reader Scan & Edit sells 4 in-app purchases, starting at $1.99 per 7 days. 机灵象英文单词 asks for nothing beyond the download.

机灵象英文单词 ships an update every 5 days, PDF Reader Scan & Edit every 4 months. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 机灵象英文单词 | PDF Reader Scan & Edit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 4 months |
| Size | 98 MB | 10 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [山东企赢盈网络科技有限公司](https://appshunter.io/developer/1469337387) | [Muhammad Usama](https://appshunter.io/developer/1676572056) |

## What reviewers say

### 机灵象英文单词

[App page](https://appshunter.io/ios/app/id6651838834)

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

**In-app purchases:** none


### PDF Reader Scan & Edit

[App page](https://appshunter.io/ios/app/pdf-reader-scan-and-edit/id6752109967)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $1.99 | per 7 days |
| Monthly Pro | $4.99 | per month |
| Yearly Pro | $49.99 | per year |
| Lifetime Pro | $99.99 | one-time |


## Frequently asked questions

### Is 机灵象英文单词 free?

机灵象英文单词 is free to download, with no in-app purchases.

### Is PDF Reader Scan & Edit free?

PDF Reader Scan & Edit is free to download, with in-app purchases available.

### Do 机灵象英文单词 or PDF Reader Scan & Edit have ads?

PDF Reader Scan & Edit shows ads; 机灵象英文单词 does not.

### Which is updated more often, 机灵象英文单词 or PDF Reader Scan & Edit?

机灵象英文单词 ships an update every 5 days, and PDF Reader Scan & Edit every 4 months. Most recently, 机灵象英文单词 was updated on October 8, 2026 and PDF Reader Scan & Edit 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.*