# 信報‧書角 vs ISBN

The clearest difference is in-app purchases: ISBN at none against 信報‧書角's 14. 信報‧書角's advantage is ads (none vs shown) and iOS requirement (12.0 vs 14.0). On price, update cadence and device support there is nothing between them.

Both are free to download. 信報‧書角 sells 14 one-off in-app purchases. ISBN asks for nothing beyond the download.

信報‧書角 ships an update every 6 months, ISBN every 4 months. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 信報‧書角 | ISBN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 4 months** |
| Size | 60 MB | 16 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HKEJ Co. Ltd.](https://appshunter.io/developer/388545123) | [剑秋 肖](https://appshunter.io/developer/806037264) |

## What reviewers say

### 信報‧書角

[App page](https://appshunter.io/ios/app/id1088878159)

**Features:** Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25+ 必備 天然之食抗衰老 | $9.99 | one-time |
| 自由的國度-普林斯頓尖子看美國 | $9.99 | one-time |
| 反寸世界 | $9.99 | one-time |
| 草本對症　尋醫不問藥 | $9.99 | one-time |
| 補營擇食1 | $9.99 | one-time |
| 補營擇食2 | $9.99 | one-time |
| 創投基金送你一億 | $11.99 | one-time |
| 地緣日本（增訂版） | $11.99 | one-time |
| 中產必須死 | $12.99 | one-time |
| 致富新世代2-科網君臨天下 | $14.99 | one-time |
| 英眼狙擊-迎風破浪 | $14.99 | one-time |
| 致富新世代3-你也可以的穩健發財派 | $14.99 | one-time |
| 李財有導：散戶煉金術 創富無難度 | $17.99 | one-time |
| 美國物業投資分析報告 | $59.99 | one-time |


### ISBN

[App page](https://appshunter.io/ios/app/isbn/id6449743934)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 信報‧書角 free?

信報‧書角 is free to download, with in-app purchases available.

### Is ISBN free?

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

### Do 信報‧書角 or ISBN have ads?

ISBN shows ads; 信報‧書角 does not.

### Which is updated more often, 信報‧書角 or ISBN?

信報‧書角 ships an update every 6 months, and ISBN every 4 months. Most recently, 信報‧書角 was updated on October 14, 2026 and ISBN on October 19, 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.*