# ScanScan(白描) vs 知音楼

The clearest difference is review sentiment: ScanScan(白描) at 87% against 知音楼's 0%. ScanScan(白描) also leads on rating (4.8 vs 1.5) and ratings volume (349 vs 19). 知音楼's advantage is in-app purchases (none vs 5) and update cadence (fortnightly vs every 2 months). On price and ads there is nothing between them.

Both are free to download. ScanScan(白描) sells 5 one-off in-app purchases. 知音楼 asks for nothing beyond the download.

ScanScan(白描) holds the better App Store score, 4.8 against 1.5. That said, the two scores are not equally well evidenced: ScanScan(白描) has 349 ratings behind it against 19, so its average is the more settled of the two. Written reviews point the same way: 87% of ScanScan(白描)'s written reviews are positive against 0% of 知音楼's.

ScanScan(白描) ships an update every 2 months, 知音楼 fortnightly. Both last shipped on October 26, 2026.

## The numbers

| Metric | ScanScan(白描) | 知音楼 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (349 ratings)](https://appshunter.io/ios/app/scanscan-ocr-text-scanner/id1249901692/reviews)** | [1.5 (19 ratings)](https://appshunter.io/ios/app/id1465692937/reviews) |
| Number of ratings | **349** | 19 |
| Positive reviews | **86.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 47 MB | 595 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [新乐 陶](https://appshunter.io/developer/826439308) | [亿度慧达教育科技(北京)有限公司](https://appshunter.io/developer/564755477) |

## What reviewers say

### ScanScan(白描)

[App page](https://appshunter.io/ios/app/scanscan-ocr-text-scanner/id1249901692)

This app uses advanced machine learning to accurately extract editable text from images and documents. It can also scan and convert documents into clear PDF files, with support for batch processing and multiple languages.

**Highlights:** Machine learning for accurate OCR, Edit and export OCR results (.txt, .docx), Multi-language text recognition, Scan documents to image/PDF, PDF to image conversion, Batch processing (OCR, color filter), Multi-language translation

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Provide food for cat | $2.99 | one-time |
| 普通会员(永久) | $3.99 | one-time |
| 普通会员(优惠) | $3.99 | one-time |
| 黄金会员(优惠) | $3.99 | one-time |
| Senior VIP (Permanent) | $5.99 | one-time |


### 知音楼

[App page](https://appshunter.io/ios/app/id1465692937)

A communication and collaboration platform designed for educational settings. It facilitates teamwork and communication within educational institutions.

**Highlights:** Team communication, Collaboration tools, Educational focus, Office platform

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ScanScan(白描) free?

ScanScan(白描) is free to download, with in-app purchases available.

### Is 知音楼 free?

知音楼 is free to download, with no in-app purchases.

### Which has better reviews, ScanScan(白描) or 知音楼?

ScanScan(白描) is rated higher. ScanScan(白描) averages 4.8 out of 5 from 349 ratings, while 知音楼 averages 1.5 from 19 ratings.

### Do ScanScan(白描) or 知音楼 have ads?

Neither ScanScan(白描) nor 知音楼 shows ads.

### Which is updated more often, ScanScan(白描) or 知音楼?

ScanScan(白描) ships an update every 2 months, and 知音楼 fortnightly. Most recently, ScanScan(白描) was updated on October 26, 2026 and 知音楼 on October 26, 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.*