# 杜杜快乐阅读1B vs Abacus AI

The clearest difference is in-app purchases: 杜杜快乐阅读1B at none against Abacus AI's 5. 杜杜快乐阅读1B also leads on iOS requirement (9.0 vs 15.0). Abacus AI's advantage is device support. On price there is nothing between them.

Both are free to download. Abacus AI sells 5 one-off in-app purchases. 杜杜快乐阅读1B asks for nothing beyond the download.

## The numbers

| Metric | 杜杜快乐阅读1B | Abacus AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 6 weeks |
| Size | 303 MB | 884 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | — | **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) | [Guangzhou Fabaceous Seedling Iinformation Technology Co., Ltd.](https://appshunter.io/developer/1231700775) |

## What reviewers say

### 杜杜快乐阅读1B

[App page](https://appshunter.io/ios/app/1b/id929247622)

**In-app purchases:** none


### Abacus AI

[App page](https://appshunter.io/ios/app/abacus-ai-student-version/id6677015880)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 珠心算Ai学生端会员(3月) | $49.99 | one-time |
| 珠心算Ai学生端会员（半年） | $99.99 | one-time |
| 珠心算Ai学生端会员（1年） | $129.99 | one-time |
| 珠心算Ai学生端会员（3年） | $149.99 | one-time |
| 珠心算Ai学生端会员（2年） | $199.99 | one-time |


## Frequently asked questions

### Is 杜杜快乐阅读1B free?

杜杜快乐阅读1B is free to download, with no in-app purchases.

### Is Abacus AI free?

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

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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.*