# 核辐射检测 vs 水印相机

The clearest difference is update cadence: 核辐射检测 at every 9 days against 水印相机's every 5 months. 核辐射检测 also leads on device support and iOS requirement (13.0 vs 15.6). On price and in-app purchases there is nothing between them.

Both are free to download. 核辐射检测 sells 1 one-off in-app purchase and 水印相机 sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

核辐射检测 ships an update every 9 days, 水印相机 every 5 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 核辐射检测 | 水印相机 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | — |
| Update frequency | **Every 9 days** | Every 5 months |
| Size | 28 MB | 30 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [薇 吴](https://appshunter.io/developer/1655264256) | [泽筠 马](https://appshunter.io/developer/1734480057) |

## What reviewers say

### 核辐射检测

[App page](https://appshunter.io/ios/app/id6464470636)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 核辐射检测永久会员 | $2.99 | one-time |


### 水印相机

[App page](https://appshunter.io/ios/app/id6612010570)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 水印相机会员订阅 | $4.99 | per 7 days |
| 水印相机会员VIP订阅 | $4.99 | per 7 days |


## Frequently asked questions

### Is 核辐射检测 free?

核辐射检测 is free to download, with in-app purchases available.

### Is 水印相机 free?

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

### Which is updated more often, 核辐射检测 or 水印相机?

核辐射检测 ships an update every 9 days, and 水印相机 every 5 months. Most recently, 核辐射检测 was updated on October 30, 2026 and 水印相机 on October 24, 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.*