# 中国联通 vs 哆哆水印相机

The clearest difference is rating: 哆哆水印相机 at 4.5 against 中国联通's 2.5. 哆哆水印相机 also leads on update cadence (every 3 days vs every 3 weeks). 中国联通's advantage is review sentiment (37% vs 0%) and in-app purchases (none vs 3). On price and ads there is nothing between them.

Both are free to download. 哆哆水印相机 sells 3 in-app purchases, starting at $4.99 per 7 days. 中国联通 asks for nothing beyond the download.

哆哆水印相机 holds the better App Store score, 4.5 against 2.5. That said, the two scores are not equally well evidenced: 中国联通 has 1.3K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 37% of 中国联通's written reviews are positive against 0% of 哆哆水印相机's, so the app with the better star average is not the one people write more warmly about.

中国联通 ships an update every 3 weeks, 哆哆水印相机 every 3 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 中国联通 | 哆哆水印相机 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (1.3K ratings)](https://appshunter.io/ios/app/id416457422/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/and/id6748603279/reviews)** |
| Number of ratings | **1.3K** | 2 |
| Positive reviews | **37.1% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 333 MB | 83 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [China United Network Communications Corporation Limited](https://appshunter.io/developer/674392285) | [dodotools Technology Co., Ltd.](https://appshunter.io/developer/1802763343) |

## What reviewers say

### 中国联通

[App page](https://appshunter.io/ios/app/id416457422)

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient app
- 🚀 Fast and responsive
- 💡 Comprehensive functionality

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔋 High battery consumption
- 📢 Too many ads and promotions
- 🤯 Confusing and cluttered UI
- 🔒 Privacy concerns

**Reported bugs**

- Login issues and authentication problems
- Compatibility problems with newer OS versions
- Inconsistent performance across devices

**Requested features**

- Add English language support
- Improve search and navigation
- Provide more detailed account information
- Implement dark mode option


### 哆哆水印相机

[App page](https://appshunter.io/ios/app/and/id6748603279)

This app helps you easily add time, location, and weather stamps to your photos and videos for work. It offers templates for various scenarios like attendance, construction, and logistics, plus tools for scanning, PDF creation, and photo enhancement.

**Highlights:** Watermark photo and video capture, Customizable watermark templates, Scan and count items, Convert photos to PDF, Enhance blurry photos, Record work attendance and logistics

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周度计划 | $4.99 | per 7 days |
| 年度会员 | $24.99 | per year |
| 终身计划 | $29.99 | one-time |


## Frequently asked questions

### Is 中国联通 free?

中国联通 is free to download, with no in-app purchases.

### Is 哆哆水印相机 free?

哆哆水印相机 is free to download, with in-app purchases available.

### Which has better reviews, 中国联通 or 哆哆水印相机?

哆哆水印相机 is rated higher. 中国联通 averages 2.5 out of 5 from 1.3K ratings, while 哆哆水印相机 averages 4.5 from 2 ratings.

### Do 中国联通 or 哆哆水印相机 have ads?

Neither 中国联通 nor 哆哆水印相机 shows ads.

### Which is updated more often, 中国联通 or 哆哆水印相机?

中国联通 ships an update every 3 weeks, and 哆哆水印相机 every 3 days. Most recently, 中国联通 was updated on October 26, 2026 and 哆哆水印相机 on October 25, 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.*