# 杜杜快乐阅读4A vs 牛账网Pad

The clearest difference is update cadence: 牛账网Pad at weekly against 杜杜快乐阅读4A's every 3 months. 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.

杜杜快乐阅读4A ships an update every 3 months, 牛账网Pad weekly. The most recent releases landed on October 26, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 杜杜快乐阅读4A | 牛账网Pad |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 154 MB | 31 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [长沙市星灿软件开发有限公司](https://appshunter.io/developer/1126375430) | [深圳账通教育发展有限公司](https://appshunter.io/developer/1275851620) |

## What reviewers say

### 杜杜快乐阅读4A

[App page](https://appshunter.io/ios/app/4a/id1129812218)

**Features:** macOS Compatibility

**In-app purchases:** none


### 牛账网Pad

[App page](https://appshunter.io/ios/app/pad/id1579833389)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 杜杜快乐阅读4A free?

杜杜快乐阅读4A is free to download, with no in-app purchases.

### Is 牛账网Pad free?

牛账网Pad is free to download, with no in-app purchases.

### Do 杜杜快乐阅读4A or 牛账网Pad have ads?

Neither 杜杜快乐阅读4A nor 牛账网Pad shows ads.

### Which is updated more often, 杜杜快乐阅读4A or 牛账网Pad?

杜杜快乐阅读4A ships an update every 3 months, and 牛账网Pad weekly. Most recently, 杜杜快乐阅读4A was updated on October 26, 2026 and 牛账网Pad on October 13, 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.*