# 中大ZHONGDA vs 水印相机

The clearest difference is in-app purchases: 中大ZHONGDA at none against 水印相机's 3. 中大ZHONGDA also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 水印相机 sells 3 in-app purchases, starting at $2.99 per 7 days. 中大ZHONGDA asks for nothing beyond the download.

中大ZHONGDA ships an update every 6 days, 水印相机 every 4 days. The most recent releases landed on September 26, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 中大ZHONGDA | 水印相机 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 4 days** |
| Size | 56 MB | 71 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Fabmagic Technology Inc.](https://appshunter.io/developer/1197833650) | [先全 顾](https://appshunter.io/developer/1706065914) |

## What reviewers say

### 中大ZHONGDA

[App page](https://appshunter.io/ios/app/zhongda/id6468903181)

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

**In-app purchases:** none


### 水印相机

[App page](https://appshunter.io/ios/app/id6499102489)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $2.99 | per 7 days |
| 月订阅 | $3.99 | per month |
| 终生会员 | $7.99 | one-time |


## Frequently asked questions

### Is 中大ZHONGDA free?

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

### Is 水印相机 free?

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

### Do 中大ZHONGDA or 水印相机 have ads?

Neither 中大ZHONGDA nor 水印相机 shows ads.

### Which is updated more often, 中大ZHONGDA or 水印相机?

中大ZHONGDA ships an update every 6 days, and 水印相机 every 4 days. Most recently, 中大ZHONGDA was updated on September 26, 2026 and 水印相机 on September 21, 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.*