# PP论文查重 vs 论文岛

The clearest difference is update cadence: PP论文查重 at every 3 weeks against 论文岛's every 2 months. PP论文查重 also leads on iOS requirement (11.0 vs 15.6). 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 论文岛 sells 3 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

PP论文查重 ships an update every 3 weeks, 论文岛 every 2 months. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | PP论文查重 | 论文岛 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 42 MB | 42 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [北京知风科技有限公司](https://appshunter.io/developer/1548901903) | [HH Tech Co.,Ltd](https://appshunter.io/developer/1774378182) |

## 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 |


### 论文岛

[App page](https://appshunter.io/ios/app/ai-and/id6740133045)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $12.99 | per month |
| 年度会员 | $24.99 | per year |
| 终身会员 | $39.99 | one-time |


## 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 论文岛 free?

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

### Do PP论文查重 or 论文岛 have ads?

Neither PP论文查重 nor 论文岛 shows ads.

### Which is updated more often, PP论文查重 or 论文岛?

PP论文查重 ships an update every 3 weeks, and 论文岛 every 2 months. Most recently, PP论文查重 was updated on September 18, 2026 and 论文岛 on September 17, 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.*