# 角端 vs Opa! Bilingual Book Reader

The clearest difference is update cadence: Opa! Bilingual Book Reader at every 5 days against 角端's every 3 weeks. 角端's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 角端 sells 7 one-off in-app purchases and Opa! Bilingual Book Reader sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

角端 ships an update every 3 weeks, Opa! Bilingual Book Reader every 5 days. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 角端 | Opa! Bilingual Book Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id6761758237/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Size | 55 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Unwall Technology(HangZhou) Limited](https://appshunter.io/developer/1891302493) | [Momentarium LLC](https://appshunter.io/developer/1671025250) |

## What reviewers say

### 角端

[App page](https://appshunter.io/ios/app/id6761758237)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 特惠包 | $0.99 | one-time |
| 月度畅读卡 | $3.99 | one-time |
| 标准包 | $3.99 | one-time |
| 季度畅读卡 | $9.99 | one-time |
| 进阶包 | $14.99 | one-time |
| 年度畅读卡 | $29.99 | one-time |
| 专业包 | $29.99 | one-time |


### Opa! Bilingual Book Reader

[App page](https://appshunter.io/ios/app/opa-bilingual-book-reader/id6817152105)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month | $4.99 | per month |
| Year | $14.99 | per year |


## Frequently asked questions

### Is 角端 free?

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

### Is Opa! Bilingual Book Reader free?

Opa! Bilingual Book Reader is free to download, with in-app purchases available.

### Do 角端 or Opa! Bilingual Book Reader have ads?

Neither 角端 nor Opa! Bilingual Book Reader shows ads.

### Which is updated more often, 角端 or Opa! Bilingual Book Reader?

角端 ships an update every 3 weeks, and Opa! Bilingual Book Reader every 5 days. Most recently, 角端 was updated on October 31, 2026 and Opa! Bilingual Book Reader on October 29, 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.*