# PP论文查重 vs AI Essay Check

The clearest difference is update cadence: AI Essay Check at every 9 days against PP论文查重's every 3 weeks. PP论文查重's advantage is iOS requirement (11.0 vs 13.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PP论文查重 sells 4 one-off in-app purchases and AI Essay Check sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PP论文查重 ships an update every 3 weeks, AI Essay Check every 9 days. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PP论文查重 | AI Essay Check |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ai-essay-check/id6758269362/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 17 MB |
| Requires iOS | **11.0** | 13.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [北京知风科技有限公司](https://appshunter.io/developer/1548901903) | [思亮 刘](https://appshunter.io/developer/1792659057) |

## What reviewers say

### PP论文查重

[App page](https://appshunter.io/ios/app/pp/id1548901901)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 论文服务费用 | $49.99 | one-time |
| 论文服务费用 | $59.99 | one-time |
| 论文服务费用 | $69.99 | one-time |
| 论文服务费用 | $79.99 | one-time |


### AI Essay Check

[App page](https://appshunter.io/ios/app/ai-essay-check/id6758269362)

Estimate the likelihood of your writing being flagged as AI-generated by academic detection tools. Identify risky sentences and receive suggestions to make your text sound more natural and human-written before submission.

**Highlights:** AI detection score estimation, Risk highlighting for sentences, Rewrite suggestions for natural phrasing, Multiple writing style options, Before & after editing comparison

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Yearly | $3.99 | per 7 days |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $59.99 | per year |


## Frequently asked questions

### Is PP论文查重 free?

PP论文查重 is free to download, with in-app purchases available.

### Is AI Essay Check free?

AI Essay Check is free to download, with in-app purchases available.

### Do PP论文查重 or AI Essay Check have ads?

Neither PP论文查重 nor AI Essay Check shows ads.

### Which is updated more often, PP论文查重 or AI Essay Check?

PP论文查重 ships an update every 3 weeks, and AI Essay Check every 9 days. Most recently, PP论文查重 was updated on October 5, 2026 and AI Essay Check 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.*