# 专注力测评 vs 水印相机

The clearest difference is ads: 专注力测评 at none against 水印相机's shown. 水印相机's advantage is update cadence (every 6 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 专注力测评 sells 12 one-off in-app purchases and 水印相机 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

专注力测评 ships an update every 3 weeks, 水印相机 every 6 days. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 专注力测评 | 水印相机 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 75 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [成都基底互动科技有限公司](https://appshunter.io/developer/1665824543) | [成都仓墨科技有限公司](https://appshunter.io/developer/1668641241) |

## What reviewers say

### 专注力测评

[App page](https://appshunter.io/ios/app/id1665824541)

This app offers a comprehensive suite of tools for assessing and training children's focus and cognitive abilities. It includes professional yet engaging tests for intelligence, attention span, memory, and more, with personalized training plans based on results. Designed to identify and address developmental and attention issues, it serves as a valuable system for evaluating a child's multi-dimensional capabilities.

**Highlights:** AI interactive focus level testing, Raven's IQ test, Multi-dimensional attention and memory assessment, Customized training plans, Analysis of attention distribution, span, and duration, Assessment of learning efficiency and spatial memory

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 注意力分配能力测评 | $0.99 | one-time |
| 空间记忆能力测评内购 | $0.99 | one-time |
| 短时记忆能力测评内购 | $0.99 | one-time |
| 注意广度能力测评内购 | $0.99 | one-time |
| 记忆保持能力测评 | $0.99 | one-time |
| 作业效率测评内购 | $0.99 | one-time |
| 学习力综合测评内购 | $0.99 | one-time |
| 专注时长水平测试内购 | $0.99 | one-time |
| 注意力测评儿童版内购 | $2.99 | one-time |
| 注意力测评家长版内购 | $2.99 | one-time |
| 瑞文智商测评 | $5.99 | one-time |
| 视觉刺激注意力水平测验 | $5.99 | one-time |


### 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 专注力测评 free?

专注力测评 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.

### Do 专注力测评 or 水印相机 have ads?

水印相机 shows ads; 专注力测评 does not.

### Which is updated more often, 专注力测评 or 水印相机?

专注力测评 ships an update every 3 weeks, and 水印相机 every 6 days. Most recently, 专注力测评 was updated on September 19, 2026 and 水印相机 on September 10, 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.*