# 四书五经二十六史 vs ISBN

四书五经二十六史 and ISBN are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases 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.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 9, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 四书五经二十六史 | ISBN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | Every 4 months |
| Size | 226 MB | 16 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guoli Jian](https://appshunter.io/developer/1606625391) | [剑秋 肖](https://appshunter.io/developer/806037264) |

## What reviewers say

### 四书五经二十六史

[App page](https://appshunter.io/ios/app/id1615850170)

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

**In-app purchases:** none


### ISBN

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 四书五经二十六史 free?

四书五经二十六史 is free to download, with no in-app purchases.

### Is ISBN free?

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

### Do 四书五经二十六史 or ISBN have ads?

Both 四书五经二十六史 and ISBN show ads.

### Which is updated more often, 四书五经二十六史 or ISBN?

四书五经二十六史 ships an update every 4 months, and ISBN every 4 months. Most recently, 四书五经二十六史 was updated on November 9, 2026 and ISBN on November 3, 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.*