# 杜杜快乐阅读1A vs 优加UMS

The clearest difference is update cadence: 优加UMS at every 3 weeks against 杜杜快乐阅读1A's every 5 months. 杜杜快乐阅读1A's advantage is iOS requirement (9.0 vs 13.0). 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1A ships an update every 5 months, 优加UMS every 3 weeks. The most recent releases landed on September 17, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 杜杜快乐阅读1A | 优加UMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Size | 278 MB | 72 MB |
| Requires iOS | **9.0** | 13.0 |
| 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) | [北京新航道教育文化发展有限责任公司](https://appshunter.io/developer/1209333326) |

## What reviewers say

### 杜杜快乐阅读1A

[App page](https://appshunter.io/ios/app/1a/id923234282)

**Features:** macOS Compatibility

**In-app purchases:** none


### 优加UMS

[App page](https://appshunter.io/ios/app/ums/id1519407498)

**In-app purchases:** none


## Frequently asked questions

### Is 杜杜快乐阅读1A free?

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

### Is 优加UMS free?

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

### Do 杜杜快乐阅读1A or 优加UMS have ads?

Neither 杜杜快乐阅读1A nor 优加UMS shows ads.

### Which is updated more often, 杜杜快乐阅读1A or 优加UMS?

杜杜快乐阅读1A ships an update every 5 months, and 优加UMS every 3 weeks. Most recently, 杜杜快乐阅读1A was updated on September 17, 2026 and 优加UMS on September 8, 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.*