# 知店 vs 水印相机

The clearest difference is in-app purchases: 知店 at none against 水印相机's 1. 知店 also leads on ads (none vs shown). 水印相机's advantage is update cadence (every 6 days vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 水印相机 sells 1 one-off in-app purchase. 知店 asks for nothing beyond the download.

知店 ships an update every 5 weeks, 水印相机 every 6 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 知店 | 水印相机 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Size | 36 MB | 75 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Drive New Media Co., Ltd.](https://appshunter.io/developer/1061856495) | [Chengdu Cangmo Technology Co., Ltd](https://appshunter.io/developer/1668641241) |

## What reviewers say

### 知店

[App page](https://appshunter.io/ios/app/id1516577410)

**Features:** macOS Compatibility

**In-app purchases:** none


### 水印相机

[App page](https://appshunter.io/ios/app/id6479632553)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 水印相机永久会员 | $9.99 | one-time |


## Frequently asked questions

### Is 知店 free?

知店 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 知店 or 水印相机 have ads?

水印相机 shows ads; 知店 does not.

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

知店 ships an update every 5 weeks, and 水印相机 every 6 days. Most recently, 知店 was updated on November 3, 2026 and 水印相机 on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*