# 百度文库 vs 51论文查重

The clearest difference is ads: 51论文查重 at none against 百度文库's shown. 51论文查重 also leads on rating (5.0 vs 4.6) and iOS requirement (11.0 vs 13.0). 百度文库's advantage is ratings volume (1.4K vs 2). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. 百度文库 sells 17 in-app purchases, starting at $1.99 per month and 51论文查重 sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

51论文查重 holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: 百度文库 has 1.4K ratings behind it against 2, so its average is the more settled of the two.

百度文库 ships an update every 2 weeks, 51论文查重 fortnightly. The most recent releases landed on September 29, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 百度文库 | 51论文查重 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (1.4K ratings)](https://appshunter.io/ios/app/ai/id426340811/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/51/id1497273923/reviews)** |
| Number of ratings | **1.4K** | 2 |
| Positive reviews | 71.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 200 MB | 25 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Beijing Baidu Netcom Science & Technology Co.,Ltd](https://appshunter.io/developer/372585298) | [Beijing Jiangao Technology Co., Ltd.](https://appshunter.io/developer/1497273922) |

## What reviewers say

### 百度文库

[App page](https://appshunter.io/ios/app/ai/id426340811)

This app offers a comprehensive AI-powered platform for content creation and document management. It can generate various content formats like PPTs, reports, and videos, and also provides access to a vast library of professional documents for learning and work.

**Highlights:** AI content generation (PPT, reports, video, etc.), Smart document summarization and Q&A, Extensive professional document library, Document management and organization, AI-powered writing assistance, Multi-modal AI assistant

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

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月VIP | $1.99 | per month |
| 连续包月 | $2.49 | per month |
| 连续包月VIP | $2.49 | per month |
| 连续包月 | $2.99 | per month |
| 连续包月VIP | $2.99 | per month |
| 自动续费（回馈） | $2.99 | per month |
| 免费试用 | $3.99 | per month |
| 连续包月（特惠） | $3.99 | per month |
| 连续包月 | $3.99 | per month |
| 连续包月 | $3.99 | per month |
| 连续包月 | $3.99 | per month |
| 6文库币 | $0.99 | one-time |
| 18文库币 | $2.99 | one-time |
| 1个月VIP | $3.99 | one-time |
| 30文库币 | $3.99 | one-time |
| 3个月VIP | $6.99 | one-time |
| 12个月VIP | $14.99 | one-time |

**What reviewers like**

- 👍 Good app
- 🚀 Fast and accurate search
- 💡 Comprehensive library of resources
- 👍 Helpful for learning and research

**What reviewers complain about**

- 💰 Paywall for full access
- 🐛 Misleading advertising about free content
- 🤬 Aggressive monetization tactics
- 🙄 Poor user experience

**Reported bugs**

- Crashes and freezes
- Sync issues between devices
- Broken download functionality

**Requested features**

- Offline access to documents
- More free content and resources
- Improved search and filtering options
- Better organization and categorization


### 51论文查重

[App page](https://appshunter.io/ios/app/51/id1497273923)

This app helps students and academics check their papers for plagiarism. It offers fast and accurate detection against a vast database, assisting with revisions to improve acceptance rates for various academic works.

**Highlights:** Plagiarism detection, Paper revision assistance, Extensive comparison database, Fast and accurate results, Supports various academic paper types, Improves paper acceptance rates

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 论文查重12元/篇 | $1.99 | one-time |
| 论文降重93元 | $13.99 | one-time |
| 论文降重98元 | $14.99 | one-time |
| 论文降重108元 | $15.99 | one-time |
| 论文降重113元 | $16.99 | one-time |
| 论文降重118元 | $17.99 | one-time |
| 论文降重123元 | $18.99 | one-time |
| 论文降重128元 | $19.99 | one-time |
| 论文降重138元 | $20.99 | one-time |
| 论文降重148元 | $21.99 | one-time |


## Frequently asked questions

### Is 百度文库 free?

百度文库 is free to download, with in-app purchases available.

### Is 51论文查重 free?

51论文查重 is free to download, with in-app purchases available.

### Which has better reviews, 百度文库 or 51论文查重?

51论文查重 is rated higher. 百度文库 averages 4.6 out of 5 from 1.4K ratings, while 51论文查重 averages 5.0 from 2 ratings.

### Do 百度文库 or 51论文查重 have ads?

百度文库 shows ads; 51论文查重 does not.

### Which is updated more often, 百度文库 or 51论文查重?

百度文库 ships an update every 2 weeks, and 51论文查重 fortnightly. Most recently, 百度文库 was updated on September 29, 2026 and 51论文查重 on September 8, 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.*