# PaperYY论文查重 vs i交院

The clearest difference is in-app purchases: i交院 at none against PaperYY论文查重's 10. i交院 also leads on update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PaperYY论文查重 sells 10 one-off in-app purchases. i交院 asks for nothing beyond the download.

PaperYY论文查重 ships an update every 2 months, i交院 every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | PaperYY论文查重 | i交院 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 91 MB | 94 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wuhan yiciyuan Information Technology Co.,Ltd](https://appshunter.io/developer/1596847468) | [上海树维信息科技有限公司](https://appshunter.io/developer/994850925) |

## What reviewers say

### PaperYY论文查重

[App page](https://appshunter.io/ios/app/paperyy/id1545288590)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 充值 8Y元 | $0.99 | one-time |
| 充值28Y元 | $3.99 | one-time |
| 青铜超值套餐 | $7.99 | one-time |
| 充值68Y元 | $9.99 | one-time |
| 购买白银超值套餐 | $14.99 | one-time |
| PaperYY6个月会员 | $24.99 | one-time |
| 购买黄金超值套餐 | $29.99 | one-time |
| PaperYY12个月会员 | $59.99 | one-time |
| 购买钻石超值套餐 | $99.99 | one-time |
| PaperYY终生会员 | $999.99 | one-time |


### i交院

[App page](https://appshunter.io/ios/app/i/id1595531684)

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

**In-app purchases:** none


## Frequently asked questions

### Is PaperYY论文查重 free?

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

### Is i交院 free?

i交院 is free to download, with no in-app purchases.

### Do PaperYY论文查重 or i交院 have ads?

Neither PaperYY论文查重 nor i交院 shows ads.

### Which is updated more often, PaperYY论文查重 or i交院?

PaperYY论文查重 ships an update every 2 months, and i交院 every 3 weeks. Most recently, PaperYY论文查重 was updated on November 3, 2026 and i交院 on October 30, 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.*