# Erlangga QR Book Reader vs YSDN

Erlangga QR Book Reader and YSDN are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Erlangga QR Book Reader | YSDN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/erlangga-qr-book-reader/id1531855411/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Free | — |
| Size | 22 MB | 119 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PENERBIT BUKU ERLANGGA MAHAMERU, PT](https://appshunter.io/developer/1053735901) | [Indoglobal Nusa Persada, PT](https://appshunter.io/developer/1471096399) |

## What reviewers say

### Erlangga QR Book Reader

[App page](https://appshunter.io/ios/app/erlangga-qr-book-reader/id1531855411)

Enhance your learning with interactive digital content embedded in textbooks. Scan QR codes within marked books to unlock audio and video resources, making education simple and modern.

**Highlights:** Scan QR codes in textbooks, Access audio content, Watch video content, Digital learning media, Visual learning aids

**In-app purchases:** none

**What reviewers like**

- 👍 Helpful for learning and tasks
- 👍 Content matches QR code
- 👍 Clear audio quality
- 👍 Good for simultaneous gadget and book learning
- 👍 Fun for education and quizzes

**What reviewers complain about**

- 👎 Difficult to use on mobile
- 👎 Audio not playing
- 👎 Videos not playing
- 👎 Server issues, cannot scan
- 👎 QR codes not scannable

**Reported bugs**

- Audio not playing on mobile
- Videos not playing
- QR codes not scannable
- Server errors preventing scanning
- Content mismatch with QR codes

**Requested features**

- Allow background audio playback
- Provide a website version for easier access
- Fix QR code scanning issues
- Ensure all QR codes have relevant content
- Improve server stability


### YSDN

[App page](https://appshunter.io/ios/app/ysdn/id6740411962)

**In-app purchases:** none


## Frequently asked questions

### Is Erlangga QR Book Reader free?

Erlangga QR Book Reader is free to download, with no in-app purchases.

### Is YSDN free?

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

### Do Erlangga QR Book Reader or YSDN have ads?

Neither Erlangga QR Book Reader nor YSDN shows ads.

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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.*