# 书中课堂 vs Onsei

The clearest difference is update cadence: Onsei at every 10 days against 书中课堂's monthly. 书中课堂's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

书中课堂 ships an update monthly, Onsei every 10 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 书中课堂 | Onsei |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1005029377/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Size | 34 MB | 33 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Hangzhou Dayread Communications Co., Ltd.](https://appshunter.io/developer/1005029376) | [鑫 陈](https://appshunter.io/developer/1709457072) |

## What reviewers say

### 书中课堂

[App page](https://appshunter.io/ios/app/id1005029377)

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

**In-app purchases:** none


### Onsei

[App page](https://appshunter.io/ios/app/onsei/id6761715885)

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

**In-app purchases:** none


## Frequently asked questions

### Is 书中课堂 free?

书中课堂 is free to download, with no in-app purchases.

### Is Onsei free?

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

### Do 书中课堂 or Onsei have ads?

Neither 书中课堂 nor Onsei shows ads.

### Which is updated more often, 书中课堂 or Onsei?

书中课堂 ships an update monthly, and Onsei every 10 days. Most recently, 书中课堂 was updated on November 1, 2026 and Onsei on October 31, 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.*